Rockledge:
Funny that this thread popped back up. I recently decided to give the stock antenna setup another shot, so I just got done fixing up my own POS power antenna assembly. More precisely, I removed the assembly from the car, since I had the fender splash shield off for a front 60K anyway. I took the gear cover off the assembly and found a broken piece of the plastic strip under there which I removed. I cleaned all the dirt and old grease out and then re-lubed it all with a moderate dose of silicone grease.
I went to Pep Boys and tried to find a replacement mast for the a Ford Taurus but of course they didn't have anything. Not to be discouraged, I ended up getting a power mast replacement that is virtually identical to the one that I pulled off my SHO (Metra - GM - #CK-PWRGM301). And get this ...it's supposed to be a direct OEM replacement for a '93-'96 Corvette! I have installed the mast into the assembly and tested it by applying 12v directly to the wire harness, and reversing the leads to make it go up and down, as necessary. Seeming fits and works great. shrug
So I reinstalled the assembly, put the splash shield back on, and as soon as I put a new stereo in my SHO I will know for sure how it all works out in the real world.

(But I'm pretty confident everything will be OK wink )