update stl build dir structure

rack/connector/connectors.scad

@@ -66,6 +66,8 @@ module connectorPositive(on, to) {
     onYBarToXBarPositive();
   } else if (on == "yBar" && to == "basePlate") {
     onYBarBasePlateConnectorPositive();
+  } else if (on == "xBar" && to == "yBar") {
+    onXBarToYBarPositive();
   } else if (on == "mainRail" && to == "yBar") {
     onMainRailYBarConnectorPositive();
   }

rack/connector/xBarYBarConnectors.scad

@@ -35,6 +35,16 @@ module onXBarToYBarNegative() {
   translate(v = [-xBarSideThickness, y, z])
   rotate(a = [0, -90, 0])
   counterSunkHead_N(rackFrameScrewType, screwExtension=inf10, headExtension=inf10);
+
+  // lugs for snap fit and hold in place
+  translate(v=[-0.1,26,13.5])
+  lug();
+}
+
+module onXBarToYBarPositive() {
+  // lugs for snap fit and hold in place
+  translate(v=[-0.1,26,2])
+  lug();
 }
 
 
@@ -46,6 +56,10 @@ module onYBarToXBarNegative() {
   rotate(a = [180, 0, 0])
   rotate(a = [0, 90, 0])
   hexNutPocket_N("m3", openSide=false, backSpace=5);
+
+  // lugs for snap fit and hold in place
+  translate(v=[-0.1,26,2])
+  lug();
 }
 
 module onYBarToXBarPositive() {
@@ -64,8 +78,22 @@ module onYBarToXBarPositive() {
       backFaceLength = 5,
       backFaceScale = 1.2
   );
+
+  // lugs for snap fit and hold in place
+  translate(v=[-0.1,26,13.5])
+  lug();
 }
 
 
 xBarConnectorToYBarConnectorTrans = mirror(v=[1,0,0]);
 yBarConnectorToXBarConnectorTrans = mirror(v=[-1,0,0]);
+
+
+module lug() {
+  hull() {
+    sphere(r=0.5);
+
+    translate(v=[0,2,0])
+    sphere(r=0.5);
+  }
+}