initial work for integrating sbc model framework v2

lib/feet.scad

@@ -0,0 +1,15 @@
+/*
+
+    feet (height)
+
+*/
+
+/* case feet */
+module feet (diameter,height) {
+    
+    difference (){ 
+        cylinder (d=diameter,h=height);
+        translate([0,0,-1]) cylinder (d=3, h=height+2,$fn=90);
+        translate ([0,0,-1]) cylinder(r=3.35,h=height-3,$fn=6);       
+    }
+}