Fix Offset and Add Makefile

Added Makefile and json

Fixed Offset to 18. Test prints show alingment.

bracket.scad

@@ -14,7 +14,7 @@ footcrossyz = 38.08;
 headcross_yz = 25.00;
 footboard_y=19;
 footboard_z=130;
-LegOff = 19;
+LegOff = 18;
 LegGap=4;
 headcrossgasket=13;
 cornergasket=5;
@@ -210,6 +210,7 @@ if (part == "head_cross_front") {
 		foot_cross_front();
 		if (mate) { %foot_cross_rear(); }
 	}
+
 } else if (part == "foot_cross_rear") {
 	rot = (plate) ? -90 : 0;
 	zt  = plate ? platfoot_y+10 : 0;
@@ -264,10 +265,14 @@ if (part == "head_cross_front") {
 	}
 }
 
-if (model == "corner_leg") {
+module leg_corner() {
 	%footboard();
 	%headpost();
 	%left(LegOff)fwd(headpost_y+LegGap)platfoot();
+}
+
+if (model == "corner_leg") {
+	%leg_corner();
 } else if (model == "center_leg") {
 	%head_cross_bar();
 	%head_plat_mid();