https://www.hdssystems.com/Products/Legacy/Arc4/
Check that out. It's not a lot of info, but is pretty cool. I was really interested until I saw 30 lumens. Definitely a collector's dream though.
Thank you for the info. Just to confirm, in these instructions, you're coming in through the front of the light and the retaining clip you're referring to is covering the UCL above the reflector? And then going in through that way you can eventually get to the MCPCB, and then the driver under...
Sorry to necro an old post, how did you get the pill out? I have an old ready-made with an MCE that I'd like to switch to an SFT-40, and might end up with a titanium one shortly as well. Probably will have follow-up questions after I can see the internals, and thank you for your help!
If you do this, please post the process, as I also have a sp120 that I'm interested in attempting to try to spruce up a bit
Darn! best of luck with the knife sales.