//
// Pause height z_pause value from caller
// head park X 15
-// head park Y 260
+// head park Y 0
// head move Z 1
// min head park Z 1
// retraction 1
tower_pos =
-0.5 * frame_inner
+ noz_gap * [1,0] * (phases - phase)
- + -[1,1] * tower_w;
+ + -[1,0] * tower_w + 0.5 * [0,-1] * frame_w;
// frame for alignment
linear_extrude(height= th_l0)