I am worried we are losing focus of design goals. The idea is to save bunch of money over buying kit from one of the places that makes vintage lifts. right now, if I had reused my old regulator, I would be at $46.97 total per window. that is using Amazon Prime
https://www.amazon.com/Dorman-742-15.../dp/B000IZ2YTW and
http://www.carparts.com/details/Chev...B&gclsrc=aw.ds . The regulator alone you purchased is $70 without motor.