I take it you're using IMR 14500's due to the current draw? Any upgrades done to handle the excess heat? I'm down to just my SB rc-g2 II left....and you're tempting me to pick up a few dx cheapies to mod.
The cells are the TF flames and work pretty fine , of course I don't know if with time that draw would ruin them...to find it the cells are marked and the 2A and 1.70A torchs have only one dedicated cell....
The heat managemment is improved a bit, three or four minutes delay , with melt solder into the pill, has a lot of room for that, also the threaded part has thermal grease...the stars are not glued , just a slight layer of grease and the press which gave the reflector, all surfaces polished where is need...
Here we are in summer and only the XP-G has a noticeable heat sag ( because is overdrived ) however you can use it at hight more than five minutes till reach around 40 C...soon I'll some heat tests...
From the guy in the link below , though he took his long time to ship it the led perform a bit better than the KD's one, this last maybe a T5 bin...now he is offering the U bin, is in processing now...
Does 17mm driver board would fit in to RC-G2 pill?
I've just XM-Led my old RC-F4 with NANJG 105C driver from KD, powered by 2xCR123a primary cells, 17mm driver fits to RC-F4 pill after removing a brass ring attached there.