I read through the thread re: bolts snapping and have to say I was surprised. Sounds like a QC issue. I have the Conversion Kit from GC that includes the camber plates plus a bunch of other stuff that still left EDC intact. Pretty sure my camber plates are different than those they make for the OEM perches though. Pics of my install are here
. They look completely different.
We didn't have any issues installing them, although I agree you should take it to a shop who's worked on the newer M3's. Maybe check with SCR? I took mine to Peak Eurosport and it was a full 12+ hour day to get these bits installed because they were having to look on the internet for everything (like how to take the back seat out to gain access to the rear perches). They also failed to reinstall the bumpstops. oops.