Just curious. Are the threaded inserts in the roof blind? Or are they open all the way to the headliner? I see a couple of folks referring to some kind of trim used to cover the raised inserts. Does anyone have a pic showing what this looks like, or a link to what they've used? I plan to use ss set screws and plastic caps, painted to match. But if the trim looks better, I'm not opposed to changing my plans.
One quick word of advice. If you use anaerobic thread locking compound (Loctite) on the threads, wait a week before using plastic plugs or trim to cover them. The fumes given off by the compound will severely embrittle most plastics. Where I work we can't use Loctite anywhere near plastic parts for that reason. Before I learned this, I ruined a torque wrench handle with a couple of drops of Loctite. It fell apart in my hand the next time I went to use it.
FWIW, I'm glad this thread was revived. It has answered a bunch of questions I had about this mod.