WOW!!!! That is super thin??? Idk. How many of the rubber washers did you use on the inside?? Have you tightened them?? Also, I ended up not using those concaved washers, I bought some flat 3/4" x 2" fender washers. I know before I would tighten mine it wouldn't allow the bulb holder to seat flush. Idk what you got going on there. That thin you should have all sorts of threads showing......... And when I say are they tightened, I don't mean fully, but pretty snug? When I was rough fitting mine I would push in on projector from front while hand tightening nut as right as I could and that would allow the holder to get pretty close to flush. Hope that helps, if not keep askin questions!!
