Fitenfyer. With my short car experience I have learned since doing the aluminum upgrades is that they are fine to a point. What I mean is the fact that you start shearing screws instead of breaking parts. Espescially the bumper mounts. What I have done and I don't know what others have done when this occurs, is simply not use locktight on the bolts that have this problem with. It makes using an easyout even easier. What I do at work is use lefthanded drill bits that works great provided they are not seized but don't know if you can get them that small. It's a catch 22, run the risk of bolts coming loose or ruin a part because it is a pain in the rear to drill a small steel machine screw out of a aluminum body. Take care.

Butch R