I've read this with interest right from the start. So now I'll say what I planned to say at first. Suggest avoiding trying to drill those big POP Rivets out if you can avoid it at almost any cost. Our first coach had Fiberglass end caps. They look impressive but they're scary thin. That sidewall material is even flimsier. Too easy to end up with a way oversized hole. I haven't gone to LED clearance lights for that reason. If the lights are still there and still work, fix'em somehow. On the first coach we had those little "dashboard bulbs" from the 1960's, maybe #53, #57, something like that with a miniature bayonet base. Constantly scraping and wire brushing but I never replaced the lights themselves. Then the lenses got loose and I drilled through lens just into the plastic base and put little stainless screws in. The current lenses are held tight with a layer of electrical tape to tighten the fit. Looks crappy, screws are better!