Yeah, I used a step drill as 3/4" is apparently the one size in my "monster drill" collection that I don't have. It's smart to paint that bare metal (I'll use some of my POR-15) as it will undoubtedly see moisture -- but no salt... not under my ownership at least. Doors to be done tomorrow. Thanks again. This will all go into the power window tech article on which I'm working.

The company known as SPAL no longer sells trinkets like the units you and Dave Irwin used back then. But the current units - there appear to be two basic designs, what I call the "separated drive system" like you, Dave and I have and the "combined drive system" where there is only one connector between the drive motor and the actuator that goes on the door handle spline shaft. You pay your money and you take your choice.