To go to manual doors, you need the manual window regulator that the window crank connects to, and all manual door panels and armrests since the armrests are shorter on manual doors. The weight savings would be basically the two window motors and the switches & wiring, 10 lbs at most. And yes, all the holes are there to mount it. I went the other way, from full manual to full power, and still have my old manual door panels (red), but not the armrests.