Love the driver retaining ring on this, and the nice LED shelf, plus the solid body, SS bezel, switch is a good one, etc. I can easily upgrade the firmware because the driver comes out with no de-soldering. Yes, lots of room.
Really, really wish you could get a 5 LED version of this, or more. Was thinking of seeing if a 5 LED reflector from another cheap SRK clone would fit in the M6 - that would be awesome.
Read thru Richard's mod #2 description many times, but not sure what it is exactly. It's probably in a thread somewhere. Think he based it on the earlier reverse engineering and experiments being done on the SRK's and the M6, where he probably was directly involved with. Way back when the SRK first came out, there was some really good re-engineering goin on here on BLF. At the time, I couldn't even follow or understand it all. This is where it all began, a classic BLF thread: https://budgetlightforum.com/t/-/11403.