diff --git a/.github/workflows/kubernetes-charts-build.yaml b/.github/workflows/kubernetes-charts-build.yaml
index fe0a8b9..60d7da7 100644
--- a/.github/workflows/kubernetes-charts-build.yaml
+++ b/.github/workflows/kubernetes-charts-build.yaml
@@ -27,6 +27,19 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: 🧹 Free up disk space
+        run: |
+          df -h # Optional: Check space before build
+          # Remove large, unnecessary packages/tools
+          sudo rm -rf /usr/share/dotnet
+          sudo rm -rf /usr/local/lib/android
+          sudo rm -rf /usr/share/swift
+          sudo rm -rf /usr/share/rust
+          sudo rm -rf /usr/share/powershell
+          # Remove cached tools and files
+          sudo apt-get clean
+          df -h # Optional: Check space before build
+
       - name: Set up Helm
         uses: azure/setup-helm@v4.3.1
 
diff --git a/helm-charts/medcat-trainer-helm/Chart.yaml b/helm-charts/medcat-trainer-helm/Chart.yaml
index 4604112..b00f4ee 100644
--- a/helm-charts/medcat-trainer-helm/Chart.yaml
+++ b/helm-charts/medcat-trainer-helm/Chart.yaml
@@ -21,7 +21,7 @@ version: 0.0.1
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
 # It is recommended to use it with quotes.
-appVersion: "3.5.1"
+appVersion: "3.6.0"
 
 maintainers:
   - name: alhendrickson
diff --git a/helm-charts/medcat-trainer-helm/README.md b/helm-charts/medcat-trainer-helm/README.md
index 499929d..1d61ea5 100644
--- a/helm-charts/medcat-trainer-helm/README.md
+++ b/helm-charts/medcat-trainer-helm/README.md
@@ -127,6 +127,7 @@ These features are not yet existing but to be added in future:
 | serviceAccount.create | bool | `true` | Specifies whether a service account should be created |
 | serviceAccount.name | string | `""` | The name of the service account to use. If not set and create is true, a name is generated using the fullname template |
 | solr.auth.enabled | bool | `false` |  |
+| solr.collection | string | `""` | Disable default collection creation by setting to empty string. MedCAT trainer does not require the collection to exist. |
 | solr.collectionReplicas | int | `1` |  |
 | solr.collectionShards | int | `1` |  |
 | solr.image.repository | string | `"bitnamilegacy/solr"` |  |
diff --git a/helm-charts/medcat-trainer-helm/values.yaml b/helm-charts/medcat-trainer-helm/values.yaml
index 428c883..2e42cf8 100644
--- a/helm-charts/medcat-trainer-helm/values.yaml
+++ b/helm-charts/medcat-trainer-helm/values.yaml
@@ -165,6 +165,8 @@ medcatConfig: |
 
 solr:
   replicaCount: 1
+  # -- Disable default collection creation by setting to empty string. MedCAT trainer does not require the collection to exist.
+  collection: ""
   collectionShards: 1
   collectionReplicas: 1
 
@@ -178,7 +180,7 @@ solr:
     app.kubernetes.io/part-of: cogstack
   image:
     repository: bitnamilegacy/solr
-    # Pin legacy version of postgresql following bitnami change to remove free images. Match prefect version
+    # Pin legacy version of solr following bitnami change to remove free images
     tag: 9.9.0-debian-12-r1
 
   zookeeper: