diff --git a/rack/stackConnector.scad b/rack/stackConnector.scad
index 6fa7efc..b906377 100644
--- a/rack/stackConnector.scad
+++ b/rack/stackConnector.scad
@@ -1,6 +1,9 @@
 include <../helper/math.scad>
 include <../helper/common.scad>
 include <../misc/magnet.scad>
+include <../helper/screws.scad>
+
+include <./config.scad>
 
 connectorRectWidth = 10;
 connectorRectDepth = 10;
@@ -15,6 +18,8 @@ connectorRectSocketSlack = 0.1;
 
 connectorBottomToScrew = 6;
 
+*stackConnectorPlug();
+
 module stackConnectorBase(rectSlack) {
 
   wSlacked = connectorRectWidth + rectSlack;
diff --git a/rack/xyBarConnector.scad b/rack/xyBarConnector.scad
index 8a4a418..ec98357 100644
--- a/rack/xyBarConnector.scad
+++ b/rack/xyBarConnector.scad
@@ -7,6 +7,8 @@ module xBarConnectorFromY_N() {
     y2 = 27;
     z = 6;
 
+    slack = 0.4;
+
     translate(v = [-m3HeatSetInsertSlotHeightSlacked, y1, z])
     rotate(a = [0, 90, 0])
     heatSetInsertSlot_N(rackFrameScrewType);
@@ -15,10 +17,11 @@ module xBarConnectorFromY_N() {
     rotate(a = [0, 90, 0])
     heatSetInsertSlot_N(rackFrameScrewType);
 
-    // TODO fix this up, no center=true
+    // TODO fix this up
+    // TODO need to add slack values
     translate(v = [-1, y1+(y2-y1)/2, 0])
     rotate(a = [0, 45, 0])
-    cube(size = [3, 10, 6], center = true);
+    cube(size = [3+slack, 10+slack, 6+slack], center = true);
 }
 
 
@@ -26,6 +29,8 @@ module yBarConnectorFromX_N() {
     y1 = 6;
     y2 = 27;
     z = 6;
+    slack = 0.2;
+
     translate(v = [-inf50/2, y1, z])
     rotate(a = [0, 90, 0])
     cylinder(r = screwRadiusSlacked(rackFrameScrewType), h = inf50, $fn = 32);
@@ -41,12 +46,14 @@ module yBarConnectorFromXLug() {
     y2 = 27;
     z = 6;
 
+    slack = 0.2;
+
     intersection() {
         // TODO fix this up, no center=true
         translate(v = [-1, y1+(y2-y1)/2, 0])
         rotate(a = [0, 45, 0])
         scale(v=[0.90,0.95,0.90])
-        cube(size = [3, 10, 6], center = true);
+        cube(size = [3-slack, 10-slack, 6-slack], center = true);
 
         halfspace(vpos=[0,0,1], p=[0,0,0]);
         halfspace(vpos=[1,0,0], p=[-2,0,0]);
diff --git a/rack/yBar.scad b/rack/yBar.scad
index 955ae8c..7851716 100644
--- a/rack/yBar.scad
+++ b/rack/yBar.scad
@@ -38,7 +38,7 @@ module yBar() {
         cylindricalFiletEdge(yBarWidth, yBarDepth-2*joinCornerDepth, yBarHeight, yBarRoundness);
       }
 
-      halfspace(vpos=[-1, 0, 1], p=[yBarWidth-0.5, 0,0]);
+      halfspace(vpos=[-1, 0, 1], p=[yBarWidth-1, 0,0]);
     }
   }
 
diff --git a/stl/rack/print/stackConnectorPlugBase_P.stl b/stl/rack/print/stackConnectorPlugBase_P.stl
new file mode 100644
index 0000000..f17451a
Binary files /dev/null and b/stl/rack/print/stackConnectorPlugBase_P.stl differ