[Number1_dog]

I am in the process of converting my 1979 911Sc from Electric to Manual windup using parallel arm regulators. When I was cleaning up the parts I put the window lifter rail in the same place as it was with the electric regulator about in the middle of the window with the same space showing on either side. I got the whole thing together and as I lowered the window it came off of the lifter rail. I took the regulator out and found that it was longer than the electric regulator. I do not see different lifter rails for manual v. electric, so am I to assume that I have to move the lifter rail to the back of the window and not center it?