Question - do you draw the pattern on your head prior to shrinking the plastic to your head? Or do you shrink the plastic take off the mold draw and then put back on and trace? My problem on drawing for full cap is getting the temple area / side burn area drawn right as well as getting the area over the ears right. Sounds like a neat way to make a template. Do u tape over the mold like u would with the Saran Wrap?