diff --git a/build.gradle b/build.gradle
index 13fd2a512..78371a620 100644
--- a/build.gradle
+++ b/build.gradle
@@ -19,7 +19,7 @@ plugins {
     id 'com.craigburke.client-dependencies' version '1.4.0'
 }
 
-version "3.3.1"
+version "3.4-biocollect-6.0-SNAPSHOT"
 group "au.org.ala"
 description "Ecodata"
 
diff --git a/grails-app/conf/application.yml b/grails-app/conf/application.yml
index 7842e7a2a..cb49ca3f5 100644
--- a/grails-app/conf/application.yml
+++ b/grails-app/conf/application.yml
@@ -29,6 +29,7 @@ app:
                 - 'url'
                 - 'imageUrl'
                 - 'logoUrl'
+                - 'fullSizeImageUrl'
     allowedHostName: 'ala.org.au'
 
 info:
diff --git a/grails-app/controllers/au/org/ala/ecodata/CommentController.groovy b/grails-app/controllers/au/org/ala/ecodata/CommentController.groovy
index 7fe3109b3..91efc9c5b 100644
--- a/grails-app/controllers/au/org/ala/ecodata/CommentController.groovy
+++ b/grails-app/controllers/au/org/ala/ecodata/CommentController.groovy
@@ -74,7 +74,7 @@ class CommentController {
                 response.addHeader("location", grailsApplication.config.grails.serverURL + "/comment/" + comment.getId().toString())
                 response.addHeader("entityId", comment.getId().toString())
                 response.setContentType("application/json")
-                render model as JSON
+                render new JSON(model)
             } else {
                 response.sendError(SC_INTERNAL_SERVER_ERROR, 'Failed saving data to database');
             }
@@ -105,7 +105,7 @@ class CommentController {
                         result.success = true;
                     }
 
-                    render(text: result as JSON, contentType: 'application/json');
+                    render(text: new JSON(result), contentType: 'application/json');
                 } else {
                     response.sendError(SC_UNAUTHORIZED, 'Only comment owner can update this comment.');
                 }
@@ -146,7 +146,7 @@ class CommentController {
             Comment c = Comment.get(params.id);
             if (c) {
                 Map mapOfProperties = commentService.getCommentProperties(c)
-                render text: mapOfProperties as JSON, contentType: 'application/json'
+                render text: new JSON(mapOfProperties), contentType: 'application/json'
             } else {
                 response.sendError(SC_NOT_FOUND, "Comment not found");
             }
diff --git a/grails-app/domain/au/org/ala/ecodata/Document.groovy b/grails-app/domain/au/org/ala/ecodata/Document.groovy
index 0473b30ac..d3df8cf45 100644
--- a/grails-app/domain/au/org/ala/ecodata/Document.groovy
+++ b/grails-app/domain/au/org/ala/ecodata/Document.groovy
@@ -48,6 +48,8 @@ class Document {
     String type // image, document, sound, etc
     String role // eg primary, carousel, photoPoint
     List<String> labels = [] // allow for searching on custom attributes
+    String citation
+    String doiLink
 
     String status = ACTIVE
     String projectId
@@ -169,6 +171,8 @@ class Document {
         externalUrl nullable: true
         projectActivityId nullable: true
         labels nullable: true
+        citation nullable: true
+        doiLink nullable: true
         isSciStarter nullable: true
         hosted nullable: true
         identifier nullable: true
diff --git a/grails-app/services/au/org/ala/ecodata/DocumentService.groovy b/grails-app/services/au/org/ala/ecodata/DocumentService.groovy
index 443df3198..f3f326530 100644
--- a/grails-app/services/au/org/ala/ecodata/DocumentService.groovy
+++ b/grails-app/services/au/org/ala/ecodata/DocumentService.groovy
@@ -166,11 +166,17 @@ class DocumentService {
         Document.findAllByProjectActivityIdAndStatus(id, ACTIVE).collect { toMap(it, levelOfDetail) }
     }
 
-    String findImageUrlForProjectId(id, levelOfDetail = []){
+    String findImageUrlForProjectId(id, boolean isThumbnail = true){
         Document primaryImageDoc;
         Document logoDoc = Document.findByProjectIdAndRoleAndStatus(id, LOGO, ACTIVE);
         String urlImage;
-        urlImage = logoDoc?.url ? logoDoc.getThumbnailUrl() : ''
+        urlImage = logoDoc?.url
+        if (urlImage) {
+            if (isThumbnail) {
+                urlImage = logoDoc.getThumbnailUrl()
+            }
+        }
+
         if(!urlImage){
             primaryImageDoc = Document.findByProjectIdAndIsPrimaryProjectImage(id, true)
             urlImage = primaryImageDoc?.url;
diff --git a/grails-app/services/au/org/ala/ecodata/ElasticSearchService.groovy b/grails-app/services/au/org/ala/ecodata/ElasticSearchService.groovy
index e864be7c6..998be145b 100644
--- a/grails-app/services/au/org/ala/ecodata/ElasticSearchService.groovy
+++ b/grails-app/services/au/org/ala/ecodata/ElasticSearchService.groovy
@@ -15,7 +15,7 @@
 
 package au.org.ala.ecodata
 
-import com.vividsolutions.jts.geom.Coordinate
+
 import grails.converters.JSON
 import grails.core.GrailsApplication
 import grails.util.Environment
@@ -27,8 +27,6 @@ import org.apache.http.client.CredentialsProvider
 import org.apache.http.impl.client.BasicCredentialsProvider
 import org.apache.http.impl.nio.client.HttpAsyncClientBuilder
 import org.elasticsearch.ElasticsearchException
-import org.elasticsearch.action.DocWriteResponse
-import org.elasticsearch.action.bulk.BulkItemResponse
 import org.elasticsearch.action.bulk.BulkProcessor
 import org.elasticsearch.action.bulk.BulkRequest
 import org.elasticsearch.action.bulk.BulkResponse
@@ -70,7 +68,6 @@ import static au.org.ala.ecodata.ElasticIndex.*
 import static au.org.ala.ecodata.Status.DELETED
 import static grails.async.Promises.task
 import static org.elasticsearch.index.query.QueryBuilders.*
-
 /**
  * ElasticSearch service. This service is responsible for indexing documents as well as handling searches (queries).
  *
@@ -953,6 +950,7 @@ class ElasticSearchService {
         projectMap.links = documentService.findAllLinksForProjectId(project.projectId)
         projectMap.isMobileApp = documentService.isMobileAppForProject(projectMap);
         projectMap.imageUrl = documentService.findImageUrlForProjectId(project.projectId);
+        projectMap.fullSizeImageUrl = documentService.findImageUrlForProjectId(project.projectId, false)
         projectMap.logoAttribution = documentService.getLogoAttributionForProjectId(project.projectId)
         projectMap.admins = permissionService.getAllAdminsForProject(project.projectId)?.collect {
             it.userId
diff --git a/scripts/releases/biocollect-6.0/migrateHubsToBS4Config.js b/scripts/releases/biocollect-6.0/migrateHubsToBS4Config.js
new file mode 100644
index 000000000..fe22202dc
--- /dev/null
+++ b/scripts/releases/biocollect-6.0/migrateHubsToBS4Config.js
@@ -0,0 +1,54 @@
+var updated = 0;
+var hubs = db.hub.find({});
+print(`Count ${hubs.count()}`)
+while (hubs.hasNext()) {
+    var hub = hubs.next();
+    var updateProps = {},
+        type;
+
+    print(`Hub - ${hub.urlPath}`);
+
+    if (hub.urlPath === 'merit' || hub.urlPath === undefined)
+        continue;
+
+    if (hub.skin !== 'bs4') {
+        updateProps.skin = 'bs4';
+        print(`Hub ${hub.urlPath} - ${hub.hubId} - has skin ${hub.skin}`);
+    }
+
+    type = hub.templateConfiguration && hub.templateConfiguration.header && hub.templateConfiguration.header.type;
+    if (type === 'biocollect' || type === "") {
+        updateProps["templateConfiguration.header.type"] = 'custom'
+        print(`Hub ${hub.urlPath} - ${hub.hubId} - has header ${type}`);
+    }
+
+    copyStyleSheet(hub, updateProps);
+
+    if (Object.keys(updateProps).length) {
+        db.hub.update({hubId: hub.hubId}, {$set: updateProps});
+        updated++;
+    }
+}
+
+function copyStyleSheet (hub, updateProps) {
+    var config = hub.templateConfiguration;
+    var styles = config.styles;
+
+    if(!styles.homepageButtonBackgroundColor && styles.navBackgroundColor){
+        updateProps["templateConfiguration.styles.homepageButtonBackgroundColor"] = styles.navBackgroundColor;
+    }
+
+    if(!styles.homepageButtonTextColor && styles.navTextColor){
+        updateProps["templateConfiguration.styles.homepageButtonTextColor"] = styles.navTextColor;
+    }
+
+    if(!styles.primaryDarkColor && styles.primaryButtonBackgroundColor) {
+        updateProps["templateConfiguration.styles.primaryDarkColor"] = styles.primaryButtonBackgroundColor;
+        updateProps["templateConfiguration.styles.primaryColor"] = styles.primaryButtonBackgroundColor;
+    }
+
+    if (!styles.darkColor && styles.defaultButtonBackgroundColor)
+        updateProps["templateConfiguration.styles.darkColor"] = styles.defaultButtonBackgroundColor;
+}
+
+print(`Updated ${updated} hubs`);
diff --git a/src/test/groovy/au/org/ala/ecodata/DocumentServiceSpec.groovy b/src/test/groovy/au/org/ala/ecodata/DocumentServiceSpec.groovy
index 117e63882..190575c61 100644
--- a/src/test/groovy/au/org/ala/ecodata/DocumentServiceSpec.groovy
+++ b/src/test/groovy/au/org/ala/ecodata/DocumentServiceSpec.groovy
@@ -1,7 +1,9 @@
 package au.org.ala.ecodata
 
+import grails.test.mongodb.MongoSpec
+import grails.testing.gorm.DomainUnitTest
 import grails.testing.services.ServiceUnitTest
-import spock.lang.Specification
+import grails.util.Holders
 
 /**
  * Tests the DocumentService.
@@ -9,7 +11,7 @@ import spock.lang.Specification
  * The test landscape image is by Pierre Bouillot.
  * The test portrait image is by John Salvino.
  */
-class DocumentServiceSpec extends Specification implements ServiceUnitTest<DocumentService> {
+class DocumentServiceSpec extends MongoSpec implements ServiceUnitTest<DocumentService>, DomainUnitTest<Document> {
 
     DocumentService service = new DocumentService()
     File tempUploadDir
@@ -24,8 +26,9 @@ class DocumentServiceSpec extends Specification implements ServiceUnitTest<Docum
         tempArchiveDir.mkdirs()
         new File(tempUploadDir, "test").mkdir()
 
-        grailsApplication.config.app = [file: [archive: [path: tempArchiveDir.getAbsolutePath()], upload: [path: tempUploadDir.getAbsolutePath()]]]
+        grailsApplication.config.app = [file: [archive: [path: tempArchiveDir.getAbsolutePath()], upload: [path: tempUploadDir.getAbsolutePath()]], uploads: [url: '/document/download/']]
         service.grailsApplication = grailsApplication
+        Holders.config.app = grailsApplication.config.app
     }
 
     def cleanup() {
@@ -126,4 +129,29 @@ class DocumentServiceSpec extends Specification implements ServiceUnitTest<Docum
         "/etc/"   | "file"          | false
     }
 
+    def "findImageUrlForProjectId should provide provide thumbnail url as well as full image url"(){
+        setup:
+        def projectId = 'abc'
+        def url
+        Document d = new Document(documentId: 'doc1', filepath: '2022-03', filename: 'Landscape_1.jpg', name:'Test Image', projectId: projectId, type: Document.DOCUMENT_TYPE_IMAGE, role: Document.ROLE_LOGO, status: Status.ACTIVE)
+        d.save(flush: true, failOnError: true)
+        service.saveFile(d.filepath, d.filename, fileAsStream(d.filename), false, Document.DOCUMENT_TYPE_IMAGE)
+
+        when:
+        url = service.findImageUrlForProjectId(projectId)
+
+        then:
+        url.contains('thumb_')
+
+        when:
+        url = service.findImageUrlForProjectId(projectId, false)
+
+        then:
+        !url.contains('thumb_')
+        url.endsWith('2022-03' + File.separator + "Landscape_1.jpg")
+
+        cleanup:
+        d.delete(flush: true)
+    }
+
 }