It would seriously be nice to know a few things on these cars....
1) exactly how much it is lowered and with what spring rates
2) camber setting front/rear
3) toe setting on the rear
I've got Ericsson offset 20" LM-R's and I'm having rubbing in the back likely because I can't find an alignment shop that knows how to deal with this. I've rubbed through liners at all four corners.
Part of the alignment question for me has to do with the rear camber. When you increase the camber it brings the tire out at the bottom rather than bring the tire in at the top. I posted a question regarding the Hotchkis rear adjustment arms in the suspension forum, but no replies yet.