Modified sandwitch example

example/tile_sandwitch.scad

 include<../tile.scad>
 
-translate([ 0, 0, -6 ]) {
-    color("blue") tile_raw_plate(T24, 1, 1, 2);
-    translate([ 0, 0, -12 ]) color("red") tile_screw_pos(T24)
-        cylinder(d = Tscrew_d(T24), h = 8);
-}
-
 color("yellow") tile(T24, h = 5);
 
-translate([ 0, 0, 12 ]) rotate([ 0, 180, 0 ]) {
+for(m=[0,1]) mirror([0,0,m])
+translate([ 0, 0, 12 ]) {
     color("blue") tile_raw_plate(T24, 1, 1, 2);
-    translate([ 0, 0, -12 ]) color("red") tile_screw_pos(T24)
+    translate([ 0, 0, 8 ]) color("red") tile_screw_pos(T24)
         cylinder(d = Tscrew_d(T24), h = 8);
 }