diff --git a/.github/ISSUE_TEMPLATE/higher-resources.md b/.github/ISSUE_TEMPLATE/higher-resources.md
index 01c2039fa..7e5283df9 100644
--- a/.github/ISSUE_TEMPLATE/higher-resources.md
+++ b/.github/ISSUE_TEMPLATE/higher-resources.md
@@ -30,7 +30,7 @@ An approximate number would do.
 
 **How much RAM per user is needed?**
 
-The default is 1GB of RAM per student.
+The default is 1 GB (One GB) of RAM per student.
 
 **Why does this class need this much RAM?**
 
diff --git a/.github/workflows/deploy-node-placeholder.yaml b/.github/workflows/deploy-node-placeholder.yaml
index a227b2c7e..f26a61bca 100644
--- a/.github/workflows/deploy-node-placeholder.yaml
+++ b/.github/workflows/deploy-node-placeholder.yaml
@@ -1,5 +1,4 @@
 name: Deploy node placeholder helm chart
-# use echo ${VAR##*: } to get the value of a variable that is a string with a colon in it
 on:
   workflow_dispatch:
   push:
@@ -21,7 +20,7 @@ jobs:
         with:
           fetch-depth: 0  # OR "2" -> To retrieve the preceding commit.
 
-      - name: Check if the nbde placeholder helm chart needs to be deployed
+      - name: Check if the node placeholder helm chart needs to be deployed
         run: |
           echo "PR labels: ${{ steps.pr-labels.outputs.labels }}"
           for label in $(echo -e "${{ steps.pr-labels.outputs.labels }}"); do
diff --git a/deployments/a11y/config/common.yaml b/deployments/a11y/config/common.yaml
index d61312239..21a74c2d1 100644
--- a/deployments/a11y/config/common.yaml
+++ b/deployments/a11y/config/common.yaml
@@ -45,6 +45,19 @@ jupyterhub:
         # this role will be assigned to...
         groups:
          - course::1535449::group::admin
+
+  custom:
+    group_profiles:
+      # DataHub Infrastructure staff
+      # https://bcourses.berkeley.edu/courses/1524699/groups#tab-80607
+      course::1524699::group::all-admins:
+        admin: true
+    admin:
+      extraVolumeMounts:
+        - name: home
+          mountPath: /home/jovyan/shared-readwrite
+          subPath: _shared
+
   singleuser:
     extraFiles:
       # DH-216
@@ -64,6 +77,11 @@ jupyterhub:
       static:
         pvcName: home-nfs-v3
         subPath: "{username}"
+      extraVolumeMounts:
+        - name: home
+          mountPath: /home/jovyan/shared
+          subPath: _shared
+          readOnly: true
     memory:
       guarantee: 3G
       limit: 3G
diff --git a/deployments/a11y/hubploy.yaml b/deployments/a11y/hubploy.yaml
index 0d471d0f3..37d7fe8fc 100644
--- a/deployments/a11y/hubploy.yaml
+++ b/deployments/a11y/hubploy.yaml
@@ -1,6 +1,6 @@
 images:
   images:
-    - name: us-central1-docker.pkg.dev/ucb-datahub-2018/user-images/a11y-user-image:b3796e35c42c
+    - name: us-central1-docker.pkg.dev/ucb-datahub-2018/user-images/a11y-user-image:6515cad7fcf5
 
 cluster:
   provider: gcloud
diff --git a/deployments/biology/config/common.yaml b/deployments/biology/config/common.yaml
index 6ee7d7173..eebb07a4d 100644
--- a/deployments/biology/config/common.yaml
+++ b/deployments/biology/config/common.yaml
@@ -62,10 +62,6 @@ jupyterhub:
         mem_limit: 4096M
         mem_guarantee: 4096M
 
-      course::1537301: # MCELLBI 201B, https://github.com/berkeley-dsep-infra/datahub/issues/6385
-        mem_limit: 5120M
-        mem_guarantee: 5120M
-
       course::1536425: # IB 134L, https://github.com/berkeley-dsep-infra/datahub/issues/6481
         mem_limit: 8192M
         mem_guarantee: 8192M
diff --git a/deployments/data101/config/common.yaml b/deployments/data101/config/common.yaml
index a9fecd2cd..fb4b3ed58 100644
--- a/deployments/data101/config/common.yaml
+++ b/deployments/data101/config/common.yaml
@@ -219,8 +219,8 @@ jupyterhub:
         - name: mongodb
           mountPath: /data/db
     memory:
-      guarantee: 2G
-      limit: 2G
+      guarantee: 3G
+      limit: 3G
 
   custom:
     group_profiles:
diff --git a/deployments/nature/hubploy.yaml b/deployments/nature/hubploy.yaml
index 23a35532a..671a0827b 100644
--- a/deployments/nature/hubploy.yaml
+++ b/deployments/nature/hubploy.yaml
@@ -1,6 +1,6 @@
 images:
   images:
-    - name: us-central1-docker.pkg.dev/ucb-datahub-2018/user-images/nature-user-image:5e8a9c7735f9
+    - name: us-central1-docker.pkg.dev/ucb-datahub-2018/user-images/nature-user-image:7ea78449c906
 
 cluster:
   provider: gcloud