any tips on installing that back bumper. I got a repro a while back and its been collecting dust waiting to put it on. Been looking for tips, etc to make the install easier before I try it on the new paint! Lot of play between the brackets/car and brackets/bumper. Then it looks like it would be hard to tighten bolts given the clearance between the bumper and the car. I guess I'm looking for the best sequence of installation.