I'm not sure whether to be proud of myself or feel let down. I took the pill from the light and dremeled down a MJ driver to fit. I replaced the emitter with a SSC P4. I also swapped out the reflector with a ground down optic from Emilion. The beam is a little floodier than i'd hoped. In direct comparison to several other of my lights, it seems to be not as bright, but is very pleasing when in use because it is a focused flood style beam. If I get a chance i'll post pictures up. Not quite as bright as i'd hoped, but with a AA extension tube I had for my Jetbeam Mk2 (it fits), it's a good bit brighter. Not sure about efficiency. Probably coming up short. Anyway, just thought it was kind of a crazy jigsaw puzzle light i'd share about