Nice, I see that light around quite a bit and would love to pick one up for that price. I didn’t know you could put an SST-90 on a MT-G2 board, thanks for that. I have a couple de-domed ones laying around. Now I might just get to playing with them.
Have you considered de-doming that emitter? It really does help throw a ton and they are super easy to do. Let it heat up and it will pull right off.
Looks like another very cool mod.
Whoa, you turned a tame light into a monster. very nice mods.
I’d perhaps suggest more a monster fire breathing dragon.
looking forward to the beamshots
Finished, last shots in the OP and beam shots in post #1.
I’m sort of opposed to de-doming anything any more. Only because I have ruined every one I have tried.
I will leave it to better modders.
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Great thread man. Read every bit of it and enjoyed it!
I must say that after you went li-ion your mods are becoming quite insane. I love it :-D
Great work O-L.
Nice. Tail current of 8.6A x 4V x 2 cells = 68 watts - small wonder it gets warm. 8)
What kind of run time do you get on high?
I know the feeling 
I’m 0 for 4 trying to de-dome MT-G2s. Mind you if the 90s are easy might have a go with one
Sunglasses are required! 8)
Awesome mod OL!
About 2 minutes before it gets so hot you can’t hold it.
Don’t know the run time on high, since I feel it gets so hot, it needs to be lowered.
Nice! 
Missed this one until now. Thanks for sharing this mod OL, the SST-90 on copper was not done yet, and in a great performing light, nice!
I just got a pretty good deal on one ($41), so I’m gonna try and mess with it a little and I’ll report back on how it goes!
I don’t find it too bad, the head gets really hot on high for a few minutes but the handle is not too bad. I run it mostly on medium and find that sufficient anyway, with high as a turbo mode. I love the big hotspot, and it throws like hell. Wonder how many lumens its putting out. I’m getting over 8 amps on 2 kk’s. It’s a beast. Glad I bought it. Thanks O-L.
I just picked up a TR-J10 and I’d like to soup it up like you did. How did you get the driver out? Mine has a brass ring holding down a white nylon disk which I presume is pressed up against the driver. There is a brass cap screwed into the center of the disk which covers (and compresses) a spring. There are no slots in the brass ring to unscrew it, so I assume it is press fitted. The ring does have a lip around the inside which I can slip a screwdriver under, but it doesn’t want to budge. Do I need to cut it out? Or is there at better way?
I couldn't get that darned brass ring out at all. I finally used a small chisel and broke the brass ring, so it would relieve pressure and then I pried it out. I replaced it with a home made copper ring.
EDIT: I could have beaten the driver out after taking out the led, but I didn't want to hurt the driver.
Dang! I wish I had your mad skills to make the replacement ring!
I don’t want to damage the driver either.
I’m wondering if I could just use a 1-1/4 retaining ring ilo a press-fit ring. Hmmm. Home Depot says I can buy one for a buck, I may have to try that.