diff --git a/scad/16mm_sprocketed_roller_var.scad b/scad/16mm_sprocketed_roller_var.scad
index ce9c350..5b34c99 100644
--- a/scad/16mm_sprocketed_roller_var.scad
+++ b/scad/16mm_sprocketed_roller_var.scad
@@ -183,10 +183,11 @@ module sprocketed_roller_reinforced (pos = [0, 0, 0], rot = [0, 0, 0], sprockets
     }
 }
 
+LIBRARY = false;
 PART = "sprocketed_roller_reinforced";
-if (PART == "sprocketed_roller_reinforced") {
+if (!LIBRARY && PART == "sprocketed_roller_reinforced") {
     rotate([180, 0, 0]) sprocketed_roller(sprockets = 18, bevel = false, model = "gearbox_motor", reinforced = true, bolts = true);
-} else if (PART == "sprocketed_wheel") {
+} else if (!LIBRARY && PART == "sprocketed_wheel") {
     rotate([180, 0, 0]) color("red") sprocketed_roller_reinforced(sprockets = 18, bevel = false, model = "gearbox_motor", bolts = true);
 }
 
diff --git a/scad/contact_printer.scad b/scad/contact_printer.scad
index dc23243..2e63d98 100644
--- a/scad/contact_printer.scad
+++ b/scad/contact_printer.scad
@@ -846,10 +846,13 @@ module panel (pos = [0, 0, 0]) {
     }
 }
 
-PART = "";
+PART = "sprocketed_roller_reinforced";
+LIBRARY = true;
 
 if (PART == "panel") {
     panel();
+} else if (PART == "sprocketed_roller_reinforced") {
+    sprocketed_roller(sprockets = 18, bevel = false, model = "gearbox_motor", reinforced = true);
 } else {
     debug();
 }