diff --git a/.github/workflows/gen_docs.yml b/.github/workflows/gen_docs.yml
index d2ae1f8..80f55be 100644
--- a/.github/workflows/gen_docs.yml
+++ b/.github/workflows/gen_docs.yml
@@ -6,10 +6,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Clone Wiki
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         repository: revarbat/BOSL2.wiki
         path: BOSL2.wiki
diff --git a/.github/workflows/gen_tutorials.yml b/.github/workflows/gen_tutorials.yml
index 0c41404..70800be 100644
--- a/.github/workflows/gen_tutorials.yml
+++ b/.github/workflows/gen_tutorials.yml
@@ -6,10 +6,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Clone Wiki
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         repository: revarbat/BOSL2.wiki
         path: BOSL2.wiki
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a23f87b..9c972ef 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Install Required Libraries
       run: sudo apt-get install libfuse2
@@ -28,10 +28,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Clone Wiki
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         repository: revarbat/BOSL2.wiki
         path: BOSL2.wiki
@@ -69,10 +69,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Clone Wiki
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         repository: revarbat/BOSL2.wiki
         path: BOSL2.wiki
diff --git a/joiners.scad b/joiners.scad
index 38bdfa0..7cf7a98 100644
--- a/joiners.scad
+++ b/joiners.scad
@@ -754,8 +754,10 @@ module _pin_shaft(r, lStraight, nub, nubscale, stretch, d, pointed)
    down(extra) cylinder(r = r, h = lStraight + extra);
    up(lStraight) {
       zscale(stretch) {
-         sphere(r = r);
-         if (pointed) up(rPoint) cylinder(r1 = rPoint, r2 = 0, h = rPoint);
+         hull() {
+            sphere(r = r);
+            if (pointed) up(rPoint) cylinder(r1 = rPoint, r2 = 0, h = rPoint/stretch);
+         }
       }
    }
    up(d) yscale(nubscale) _pin_nub(r = r, nub = nub, h = lStraight - d);