Some Ideas here are surely welcome ! Not sure what type of aluminum bullet type of headlight I have, it looks a lot like a Rivera Primo Mighty Magnum or a similar version from Headwinds. It was on the bike ('07 FXD) when I got it a few years ago. I believe the recessed ring has to spin off but not sure how. The allen set screw is not there, but trying to use friction from my fingers, I have not been able to spin it for removal. I'm first asking if that's how the trim ring is removed, and if so, are there any ideas on how to get it removed. If I spray a penetrating oil I then won't have any friction to spin the ring, also do't really want oil on/around a headlamp. I look forward to any ideas. Thanks !