I'm sure you're not the only one. But I think you're the only one who did detailed diagnosis of the problem and actually found out where the problem was. If I'd been the one to run into this problem, I would have just tried the builder a second time, written it off to FM, and forgotten about it. I'm sure there are a few "help, can't get drive upgrade to work" posts on the BBS that were caused by this problem, we just didn't know it at the time.