Not really a mod, but it might give inspiration
I made a double flashlight tripod mount from a 1U server rack cover, the plan is to make beamshots and flashlight comparisons.
Good idea. - I wont say what my first thought was… 
A dirty mind is a joy forever 
Broom holder?
hahahaha
Modded an empty bottle of my favorite rum into some X-mas lighting.
Put a lighted tailcap on my brandnew Panda White Lumintop Tool AA 2.0 HM.
And made this light available in my 3k post GAW.
Fitted a 5a 2s mantaray driver into a jax Z1 with a nice 80 CRI MT-G2 for the ultimate flooder
Love seeing the MT-G2 getting some attention! Sweet!
Copper Tool
installed E21a 3500k and fully captive clip
due to a series of mishaps, and unanticipated outcomes,
the clip now fits in my preferred hat lamp orientation
2 cheap eBay lights with 2 cheap eBay LED's, yes I was bored.
Pretty vintage led now . but i still prefer it to the Bill Gates summoning Xhp70.2, im not sure what the lumen count is at 5 amps but it certainly lights a nice area
I still have multiple lights with MT-G2, including a triple that I built from scratch. Love the tint this big emitter makes and surprisingly enough it can have a nice beam profile in the right reflector. Also have an old BTU Shocker that I fitted with MT-G2’s, in this light there is a defined hot spot that is surprisingly small… really do love em! 
Edit: Was forgetting about the massive TrustFire TR-J20 that I built a huge heat sink for and fitted with 4 MT-G2’s… it’s making almost 15,000 lumens while the other two big ones are in the 10,000 to 12,000 range. Yup, really do love the MT-G2 and like seeing it being put to use.
Edit II:
I have 19 MT-G2’s in use, in (I think) 12 flashlights. Probably forgetting something…
Very nice work, I bet they really kick it out!! I like the 5k 80cri it really isnt far behind the xhp70 when driven hard but the tint is just so much nicer almost like real daylight
I have the MT-G2 in a lot of very different lights, such as the Nitecore TM-03, a 2D Maglite with a fiber optic battery indicator, a Lucky Sun D80, Solarforce K3, S2200, M8, and C2000 , as well as my DBC-05 triple, the BTU Shocker, and the TR-J20. Also have a hybrid TIR over an MT-G2 in an L6. And of course, I have an X6 with the fat MT-G2 and an extension tube. 
One of the major differences is the array status of the big emitter, it’s almost like a COB really. So the quality of the light is due to the 72 small die surfaces most likely. When I was building the M8 I didn’t have a suitable driver back then so I ran it literally direct drive, it would pull just over 16A at about 4300 lumens. Ah, the good ol days! lol
Probably funny questions, but I’m still too young here.
I have this flashlight disassembled for a long time because I don’t know how to do heat dissipation well. Do you have any great solution or did you leave it as is?
There was an extension tube for X6?
I made a heat sink for the K3.
I was one of the team on the X6 group buy, there were a few extension tubes made for the team. They missed the length but I have worked around that… interestingly enough that was another Neal failure, not only was the length wrong but the MT-G2’s he sent for me to build team lights were also wrong… he sent 9V instead of 6V MT-G2’s.
Yep—- MT-G2 is Really Nice— I have several lights myself—-one of my oldie but goodies — Supbeam K40M with a 4k
Ooo those 4k jobs are like rocking horse poop these days! cant find them anywhere
With frustrations of the W1 not staying centered in my D1S. It recieved a SST-20 3500k.
Biting my nails waiting for a K1 to arrive anyway.