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Really nice detailed write-up. Nice job. I had no idea there's such thing as a pinch bolt spreader. Must buy!
Just an FYI on a couple of things. Disconnecting the LCA isn't absolutely necessary. I believe what's posted is how BMW says to remove the front shocks, but all that's really needed is to remove the front shock assembly are the top bolts, swaybar endlink, the shock electronic plug, and pinch bolt. You can then push down slightly on the hub and strut assembly will slide out.
Also, bump stops in these cars, as for most late model cars, are actually part of the spring compression and rebound system. These suspensions are actually designed to routinely operate on the stop. The systems are ultimately a bump stop but they're also in a sense, a spring. So, if Dinan recommends different stops on both axles, I'd recommend doing it. The replacement part may be 1/4" shorter but it may be of a different durometer as well.
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