I will tackle the Rear SAM this week. If it follows everything else in this car, it will be a complete struggle.

As for the braces, I did a *very* quick look. The captive nuts are not there. Also, the coupe trunk structure may be the reason the coupes did not have them. I think it is different enough to make the braces not fit. I have to spend a bit more than 30 seconds looking to be sure though.