Michael posted a message to the e30ic mailing list, after successfully repairing his power top. He used the repair kit from Christian and included several other good peices of information. Here's his message:
Well, after a year or so of tinkering, pondering and doing research on the net, I finally bit the bullet and reconnected my power top. And by god (furiously knocks on nearby oak table) it seems to be working just fine. I thought I would share a few of my experiences with you guys, considering how much help I've gotten from this group and elsewhere.
If you have any doubts about the condition of your top motor casing, I can't stress enough how nice the motor repair kit from ideenbau in Germany is. It's very well made, not that difficult to install, and really should alleviate problems down the road. I know its installation is well detailed on e30ic.com.
Definitely replace both of the top shocks (and their carriers as the dimension of the shock body has been enlarged just enough that the new shocks wont fit). If you're familiar with realoem.com, they are numbers 3 and 4 in the folding top section, or BMW p/ns 54 31 1 932 751 and 54 31 1 943 751. Even though my top is original and the tension straps kinda saggy, the top generally has no trouble going up or down properly, and you can definitely feel the shocks helping to push the frame back up.
Make sure the top frame is very well cleaned and lubricated at all pivot points. When I was operating my top manually the difference in ease of operation before and after the lube job was tremendous. I used carb cleaner (very carefully) with a big rag to catch over spray and then went back with Wurth spray lubricant.
There is a modified motor cover, p/n 51 71 4 376 227 which was introduced after customers complained of marks on the window and right side of the top--see TSB 54 02 93. It's made out of the same sort of material as the trunk linings and has a much lower profile. It's still available, and thankfully isn't too expensive--$25 or so.
If you can get a hold of the instructions for retrofitting the power top, it is well worth it. I found a copy on ebay.de (Einbauanleiting fur EM-Verdeck) which is really a stretch for my limited deutsch, but it's very nicely illustrated, shows where every component is located and has detailed measurements for adjusting the linkages, motor arms and microswitches. Unfortunately there are some dealer only tools involved in the adjustments, including an $85 gauge for setting the top motor switches, but it is possible to eyeball things based on the pictures. Some of this information is the same as what's included in the manual posted here by Hakan, but I think there is a little more detail overall.
Well, that's all I can think of off the top of my head. I am definitely not an expert, but if anyone has any questions or comments about the power tops, I know I have spent way too much time doing research on them and would be happy to put my '02 cents in.
Happy topless driving,