diff --git a/logistics/build.gradle.kts b/logistics/build.gradle.kts
index 64ba2c5..0cd970c 100644
--- a/logistics/build.gradle.kts
+++ b/logistics/build.gradle.kts
@@ -1,4 +1,4 @@
-version = "0.2.9-alpha.3"
+version = "0.2.9-alpha.7"
 
 dependencies {
     implementation(project(":simple-upgrades"))
diff --git a/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/gui/cable/ContainerCableConfigMenu.kt b/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/gui/cable/ContainerCableConfigMenu.kt
index a12b57b..a2e9c19 100644
--- a/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/gui/cable/ContainerCableConfigMenu.kt
+++ b/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/gui/cable/ContainerCableConfigMenu.kt
@@ -56,7 +56,7 @@ abstract class ContainerCableConfigMenu<H : ContainerEndPointDataHolder<*>>(
      *
      * Should only be called from the main thread.
      */
-    open fun updateGui() {
+    fun updateGui() {
         updatableItems.notifyWindows()
     }
     
diff --git a/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/gui/cable/ItemCableConfigMenu.kt b/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/gui/cable/ItemCableConfigMenu.kt
index 81e5e15..42305ff 100644
--- a/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/gui/cable/ItemCableConfigMenu.kt
+++ b/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/gui/cable/ItemCableConfigMenu.kt
@@ -13,6 +13,7 @@ import xyz.xenondevs.nova.ui.menu.addIngredient
 import xyz.xenondevs.nova.ui.menu.item.AddNumberItem
 import xyz.xenondevs.nova.ui.menu.item.DisplayNumberItem
 import xyz.xenondevs.nova.ui.menu.item.RemoveNumberItem
+import xyz.xenondevs.nova.util.runTask
 import xyz.xenondevs.nova.world.block.tileentity.network.node.NetworkEndPoint
 import xyz.xenondevs.nova.world.block.tileentity.network.type.item.ItemNetwork
 import xyz.xenondevs.nova.world.block.tileentity.network.type.item.holder.ItemHolder
@@ -63,13 +64,11 @@ class ItemCableConfigMenu(
         
         insertFilter = holder.insertFilters[face]?.toItemStack()
         extractFilter = holder.extractFilters[face]?.toItemStack()
-    }
-    
-    override fun updateGui() {
-        super.updateGui()
         
-        insertFilterInventory.setItemSilently(0, insertFilter)
-        extractFilterInventory.setItemSilently(0, extractFilter)
+        runTask {
+            insertFilterInventory.setItemSilently(0, insertFilter)
+            extractFilterInventory.setItemSilently(0, extractFilter)
+        }
     }
     
     override fun writeChanges(): Boolean {
diff --git a/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/registry/Blocks.kt b/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/registry/Blocks.kt
index 0d44b83..0912ccb 100644
--- a/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/registry/Blocks.kt
+++ b/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/registry/Blocks.kt
@@ -73,7 +73,7 @@ object Blocks : BlockRegistry, AddonHolder by Logistics {
     val ULTIMATE_FLUID_TANK = tank("ultimate", ::UltimateFluidTank)
     val CREATIVE_FLUID_TANK = tank("creative", ::CreativeFluidTank)
     
-    val STORAGE_UNIT = interactiveTileEntity("storage_unit", ::StorageUnit) { behaviors(CABLE, BlockSounds(SoundGroup.STONE)) }
+    val STORAGE_UNIT = interactiveTileEntity("storage_unit", ::StorageUnit) { behaviors(OTHER, BlockSounds(SoundGroup.STONE)) }
     val FLUID_STORAGE_UNIT = interactiveTileEntity("fluid_storage_unit", ::FluidStorageUnit) { behaviors(Bucketable, OTHER, BlockSounds(SoundGroup.STONE)) }
     val VACUUM_CHEST = interactiveTileEntity("vacuum_chest", ::VacuumChest) { behaviors(OTHER, BlockSounds(SoundGroup.STONE)) }
     val TRASH_CAN = interactiveTileEntity("trash_can", ::TrashCan) {
diff --git a/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/tileentity/StorageUnit.kt b/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/tileentity/StorageUnit.kt
index 17d8f41..8d9c5b6 100644
--- a/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/tileentity/StorageUnit.kt
+++ b/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/tileentity/StorageUnit.kt
@@ -11,6 +11,7 @@ import xyz.xenondevs.cbf.Compound
 import xyz.xenondevs.commons.provider.MutableProvider
 import xyz.xenondevs.invui.gui.Gui
 import xyz.xenondevs.invui.inventory.VirtualInventory
+import xyz.xenondevs.invui.inventory.event.ItemPostUpdateEvent
 import xyz.xenondevs.invui.inventory.event.ItemPreUpdateEvent
 import xyz.xenondevs.invui.item.ItemProvider
 import xyz.xenondevs.invui.item.builder.ItemBuilder
@@ -21,7 +22,6 @@ import xyz.xenondevs.nova.config.entry
 import xyz.xenondevs.nova.ui.menu.sideconfig.OpenSideConfigItem
 import xyz.xenondevs.nova.ui.menu.sideconfig.SideConfigMenu
 import xyz.xenondevs.nova.util.item.takeUnlessEmpty
-import xyz.xenondevs.nova.util.runTaskLater
 import xyz.xenondevs.nova.world.BlockPos
 import xyz.xenondevs.nova.world.block.state.NovaBlockState
 import xyz.xenondevs.nova.world.block.tileentity.NetworkedTileEntity
@@ -36,7 +36,7 @@ class StorageUnit(pos: BlockPos, state: NovaBlockState, data: Compound) : Networ
     
     private val inventory = StorageUnitInventory(storedValue("type", true, ItemStack::empty), storedValue("amount", true) { 0 })
     private val inputInventory = VirtualInventory(null, 1).apply { setPreUpdateHandler(::handleInputInventoryUpdate) }
-    private val outputInventory = VirtualInventory(null, 1).apply { setPreUpdateHandler(::handleOutputInventoryUpdate) }
+    private val outputInventory = VirtualInventory(null, 1).apply { setPreUpdateHandler(::handlePreOutputInventoryUpdate); setPostUpdateHandler(::handlePostOutputInventoryUpdate) }
     
     init {
         storedItemHolder(inventory to NetworkConnectionType.BUFFER)
@@ -47,18 +47,23 @@ class StorageUnit(pos: BlockPos, state: NovaBlockState, data: Compound) : Networ
             event.isCancelled = true
     }
     
-    private fun handleOutputInventoryUpdate(event: ItemPreUpdateEvent) {
+    private fun handlePreOutputInventoryUpdate(event: ItemPreUpdateEvent) {
         if (event.updateReason == SELF_UPDATE_REASON)
             return
         
-        if (event.isAdd || event.isSwap) {
+        if (!event.isRemove) {
             event.isCancelled = true
-        } else if (event.isRemove && !inventory.type.isEmpty) {
-            inventory.take(0, event.removedAmount)
-            runTaskLater(1) { menuContainer.forEachMenu(StorageUnitMenu::update) }
         }
     }
     
+    private fun handlePostOutputInventoryUpdate(event: ItemPostUpdateEvent) {
+        if (event.updateReason == SELF_UPDATE_REASON)
+            return
+        
+        // preUpdateHandler enforces that only remove is possible
+        inventory.take(0, event.removedAmount)
+    }
+    
     private fun updateOutputSlot() {
         if (inventory.type.isEmpty) {
             outputInventory.setItem(SELF_UPDATE_REASON, 0, null)
diff --git a/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/tileentity/VacuumChest.kt b/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/tileentity/VacuumChest.kt
index dc001d0..9e8dcbe 100644
--- a/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/tileentity/VacuumChest.kt
+++ b/logistics/src/main/kotlin/xyz/xenondevs/nova/addon/logistics/tileentity/VacuumChest.kt
@@ -80,10 +80,10 @@ class VacuumChest(pos: BlockPos, state: NovaBlockState, data: Compound) : Networ
         items.clear()
         
         if (serverTick % 10 == 0) {
-            pos.world.entities.forEach {
+            pos.world.getNearbyEntities(region.toBoundingBox()).forEach {
                 if (it is Item
-                    && it.location in region
                     && filter?.allows(it.itemStack) != false
+                    && inventory.canHold(it.itemStack.clone().apply { amount = 1 })
                     && runBlocking { ProtectionManager.canInteractWithEntity(this@VacuumChest, it, null) } // TODO: non-blocking
                 ) {
                     items += it
diff --git a/machines/build.gradle.kts b/machines/build.gradle.kts
index 63819a5..2da7b31 100644
--- a/machines/build.gradle.kts
+++ b/machines/build.gradle.kts
@@ -1,4 +1,4 @@
-version = "0.4.6-alpha.12"
+version = "0.4.6-alpha.15"
 
 dependencies {
     implementation(project(":simple-upgrades"))
diff --git a/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/energy/LightningExchanger.kt b/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/energy/LightningExchanger.kt
index 038c113..4928abf 100644
--- a/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/energy/LightningExchanger.kt
+++ b/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/energy/LightningExchanger.kt
@@ -12,7 +12,7 @@ import xyz.xenondevs.commons.collections.enumSetOf
 import xyz.xenondevs.invui.gui.Gui
 import xyz.xenondevs.nova.addon.machines.Machines
 import xyz.xenondevs.nova.addon.machines.registry.Blocks.LIGHTNING_EXCHANGER
-import xyz.xenondevs.nova.addon.machines.util.efficiencyDividedValue
+import xyz.xenondevs.nova.addon.machines.util.efficiencyMultipliedValue
 import xyz.xenondevs.nova.addon.simpleupgrades.gui.OpenUpgradesItem
 import xyz.xenondevs.nova.addon.simpleupgrades.registry.UpgradeTypes
 import xyz.xenondevs.nova.addon.simpleupgrades.storedEnergyHolder
@@ -41,8 +41,8 @@ class LightningExchanger(pos: BlockPos, blockState: NovaBlockState, data: Compou
     
     private val upgradeHolder = storedUpgradeHolder(UpgradeTypes.EFFICIENCY, UpgradeTypes.ENERGY)
     private val energyHolder = storedEnergyHolder(MAX_ENERGY, upgradeHolder, EXTRACT, BLOCKED_FACES)
-    private val minBurst by efficiencyDividedValue(MIN_BURST, upgradeHolder)
-    private val maxBurst by efficiencyDividedValue(MAX_BURST, upgradeHolder)
+    private val minBurst by efficiencyMultipliedValue(MIN_BURST, upgradeHolder)
+    private val maxBurst by efficiencyMultipliedValue(MAX_BURST, upgradeHolder)
     private var toCharge = 0L
     
     override fun handleTick() {
diff --git a/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/energy/SolarPanel.kt b/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/energy/SolarPanel.kt
index 811afa6..1fc9b7a 100644
--- a/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/energy/SolarPanel.kt
+++ b/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/energy/SolarPanel.kt
@@ -7,7 +7,7 @@ import xyz.xenondevs.cbf.Compound
 import xyz.xenondevs.commons.collections.enumSetOf
 import xyz.xenondevs.invui.gui.Gui
 import xyz.xenondevs.nova.addon.machines.registry.Blocks.SOLAR_PANEL
-import xyz.xenondevs.nova.addon.machines.util.efficiencyDividedValue
+import xyz.xenondevs.nova.addon.machines.util.efficiencyMultipliedValue
 import xyz.xenondevs.nova.addon.simpleupgrades.gui.OpenUpgradesItem
 import xyz.xenondevs.nova.addon.simpleupgrades.registry.UpgradeTypes
 import xyz.xenondevs.nova.addon.simpleupgrades.storedEnergyHolder
@@ -35,7 +35,7 @@ class SolarPanel(pos: BlockPos, blockState: NovaBlockState, data: Compound) : Ne
     private val upgradeHolder = storedUpgradeHolder(UpgradeTypes.EFFICIENCY, UpgradeTypes.ENERGY)
     private val energyHolder = storedEnergyHolder(MAX_ENERGY, upgradeHolder, EXTRACT, BLOCKED_FACES)
     
-    private val peakEnergyOutput by efficiencyDividedValue(ENERGY_PER_TICK, upgradeHolder)
+    private val peakEnergyOutput by efficiencyMultipliedValue(ENERGY_PER_TICK, upgradeHolder)
     
     private lateinit var obstructionTask: BukkitTask
     private var obstructed = true
diff --git a/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/mob/Breeder.kt b/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/mob/Breeder.kt
index 355a417..636979c 100644
--- a/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/mob/Breeder.kt
+++ b/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/mob/Breeder.kt
@@ -24,7 +24,6 @@ import xyz.xenondevs.nova.ui.menu.sideconfig.OpenSideConfigItem
 import xyz.xenondevs.nova.ui.menu.sideconfig.SideConfigMenu
 import xyz.xenondevs.nova.util.BlockSide
 import xyz.xenondevs.nova.util.EntityUtils
-import xyz.xenondevs.nova.util.getSurroundingChunks
 import xyz.xenondevs.nova.util.nmsEntity
 import xyz.xenondevs.nova.util.unwrap
 import xyz.xenondevs.nova.world.BlockPos
@@ -46,6 +45,7 @@ private val BREED_LIMIT by BREEDER.config.entry<Int>("breed_limit")
 private val MIN_RANGE = BREEDER.config.entry<Int>("range", "min")
 private val MAX_RANGE = BREEDER.config.entry<Int>("range", "max")
 private val DEFAULT_RANGE by BREEDER.config.entry<Int>("range", "default")
+private val FEED_BABIES by BREEDER.config.entry<Boolean>("feed_babies")
 
 private val FOOD_MATERIALS = setOf(
     Tag.ITEMS_PIGLIN_FOOD, Tag.ITEMS_FOX_FOOD, Tag.ITEMS_COW_FOOD, Tag.ITEMS_GOAT_FOOD, Tag.ITEMS_SHEEP_FOOD,
@@ -88,10 +88,10 @@ class Breeder(pos: BlockPos, blockState: NovaBlockState, data: Compound) : Netwo
             if (idleTime++ >= mxIdleTime) {
                 idleTime = 0
                 
-                val breedableEntities = pos.location.chunk
-                    .getSurroundingChunks(1, includeCurrent = true, ignoreUnloaded = true)
-                    .flatMap { it.entities.asList() }
+                val breedableEntities = pos.location.world
+                    .getNearbyEntities(region.toBoundingBox())
                     .filterIsInstance<Animals>()
+                
                 // TODO: protection check?
                 
                 var breedsLeft = min((energyHolder.energy / energyPerBreed).toInt(), BREED_LIMIT)
@@ -112,6 +112,9 @@ class Breeder(pos: BlockPos, blockState: NovaBlockState, data: Compound) : Netwo
         for ((index, item) in inventory.items.withIndex()) {
             if (item == null) continue
             
+            if (!FEED_BABIES && !animal.isAdult)
+                continue
+            
             fakePlayer.setItemInHand(InteractionHand.MAIN_HAND, item.unwrap())
             val result = animal.nmsEntity.interact(fakePlayer, InteractionHand.MAIN_HAND)
             if (result.consumesAction()) {
diff --git a/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/mob/MobKiller.kt b/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/mob/MobKiller.kt
index a627ee5..dccbb06 100644
--- a/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/mob/MobKiller.kt
+++ b/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/mob/MobKiller.kt
@@ -74,10 +74,9 @@ class MobKiller(pos: BlockPos, blockState: NovaBlockState, data: Compound) : Net
                 
                 val killLimit = min((energyHolder.energy / energyPerDamage).toInt(), KILL_LIMIT)
                 
-                pos.world.entities
-                    .asSequence()
+                pos.world.getNearbyEntities(region.toBoundingBox()).asSequence()
                     .filterIsInstance<Mob>()
-                    .filter { it.location in region && runBlocking { ProtectionManager.canHurtEntity(this@MobKiller, it, null) } } // TODO non-blocking
+                    .filter { runBlocking { ProtectionManager.canHurtEntity(this@MobKiller, it, null) } } // TODO non-blocking
                     .take(killLimit)
                     .forEach { entity ->
                         // TODO: custom damage type
diff --git a/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/world/ChunkLoader.kt b/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/world/ChunkLoader.kt
index 1959845..f6127f1 100644
--- a/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/world/ChunkLoader.kt
+++ b/machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/world/ChunkLoader.kt
@@ -42,7 +42,10 @@ class ChunkLoader(pos: BlockPos, blockState: NovaBlockState, data: Compound) : N
     private var active = false
     
     private val energyPerTick by combinedProvider(ENERGY_PER_CHUNK, range, upgradeHolder.getValueProvider(UpgradeTypes.EFFICIENCY))
-        .map { (energyPerChunk, range, efficiency) -> (energyPerChunk * range * range / efficiency).roundToLong() }
+        .map { (energyPerChunk, range, efficiency) ->
+            val diameter = range * 2 + 1
+            (energyPerChunk * diameter * diameter / efficiency).roundToLong()
+        }
     
     override fun handleDisable() {
         super.handleDisable()
diff --git a/machines/src/main/resources/configs/breeder.yml b/machines/src/main/resources/configs/breeder.yml
index 9cdf115..686b0f9 100644
--- a/machines/src/main/resources/configs/breeder.yml
+++ b/machines/src/main/resources/configs/breeder.yml
@@ -3,6 +3,7 @@ energy_per_tick: 10
 energy_per_breed: 100
 idle_time: 200
 breed_limit: 5
+feed_babies: false
 
 range:
   min: 1