[EricH]

Gentlemen, the OP posted this: "The screws are INSIDE the Bumper Zone."

Taking that literally, there is no problem. According to Q&A and the Updates 6 & 7, you can have screws sticking out in the Bumper Zone. You cannot have them above or below.

Where I do see an issue is that the bumpers may not be fully backed by frame material--the frame will be about 1/16" off, at a guess. Time for a lightweight shim between the wheel brackets.