Gregory in Switzerland seems to be a long-time bimmer guy and reports having done a couple of shift kits before, so I expect he will be a helpful source once he gets his in. My impression is that the trickiest part is the 'blind' fitting of that retainer clip. Haven't had a chance to speak with UUC Rob, but my understanding is that the oval bearing sleeves (02 in the realoem diagram] at the end of the shifting arm are replaced with delrin in the kit, and that the Gearshift rod joint (12) is the other usual wear item replaced. From my invoice, mine wasn't, perhaps because it was in good shape. As I noted earlier, I think the billed six hours comes from the BMW 'book,' which is how shops generate revenue; I expect the actual install time for a skilled shadetree is less than that [though everything always seems to take me longer
], and someone who has done a couple [with small, agile hands] can knock it out. I wish I had had time to do it myself, but, not having done a shift kit before and having limited time/garage/lift assets, left this to the pros. I'm never happy with the bill, but sure am happy with the results!