You can basically try this at home, if you like. Get an ice cube, and hold it against the head of the ROT66 while it runs on turbo.
It will probably eat through the ice cube pretty quickly, but it should stay at turbo until the ice runs out.
So I just had the exact same “carrier won’t fit with cells installed” thing happen with one of my ROT66s, figured I’d chime in here with what I did to fix it.
I had an old set of VTC4s in it and had been using the light for a couple days, went to put a set of new 30Qs in (mainly just to see if they were too long or too short, wasn’t expecting them to be too fat) and then couldn’t install the carrier anymore. Tried it again with a set of new VTC6s and again the carrier wouldn’t fit.
I didn’t like the idea of having a loose post, so instead I loosened each of the five accessible screws one at a time and tugged outwards on the loose end of the post while re-tightening the screw. Did that to all five of the post-ends with accessible screws and now every type of cell I have fits fine, no loose posts either.
Heh….never thought about that. I guess it’d be similar too, just that snow’s soft physical property probably still holds a certain edge in maintaining superior contact with the host’s body. 
Was Newlumen advocating leaving one post loose permanently? I didn’t think so. You need all posts to be tight, they carry all the battery current. Leaving one loose permanently could potentially cause problems or maybe even reduce output (in theory).
I did the same thing last night after they finally slid in easily.
One of the poles on the carrier is not insulated all the way to the top. Does that make any difference overall?
It doesnt reduce output.
Fully charged. 7000 lumen
3.86v. 5800 lumen
Nope, snow does not have an edge here. The ice cube melts to fit, almost like it’s made of butter. The main difference is that snow doesn’t last as long. Toss a turbo hot-rod light onto a snow pile and it’ll just sink downward as it melts a hole.
No, it should be fine.
It’s technically not needed, but I would leave as is.
That’s quite an endorsement! So now you’ll have one of each stock emitter family, plus a LH351D?
Do you have any other 3 to 4 x 18650 lights like the Q8 to discuss pros and cons relative to the ROT66?
Not going to get LH351D because the ones available in the market now have too much yellow/green like the 219C and needs a green filter to look comparable to the 219B, SST-20, or Cree A and D tints. I have two M43, MK34, two MF01, two MT09R, MT03, and Eagtac MX30L3-C 219B 4500k, and maybe a few more I can’t remember.
The M43 has more heatsinking mass and more premium quality feel. Can maintain high output better due to additional mass so more practical. However, I dislike the UI. ROT66 has Narsil or Anduril, which is much better and the ROT66 has brighter turbo. The M43 would be my favorite if it had the same ROT66 driver and 219B 9080 option.
The MK34 uses 219C and the tint is a bit yellow for my liking. I also hate Manker UI that lumps Turbo with the blinky modes. It is a super nice looking light and more mass than ROT66 so has great modding potential.
MF01 stock sucks. The V2 219C 5000k is very greenish. UI sucks too. I had mine modded by Lexel to use buck driver and Narsil. Much better. It has much more mass so can handle lumens better than ROT66. Not as good looking as ROT66 though and still has greenish 219c.
MT03 is the heaviest 4x18650 flooder I’ve seen and extremely well built. MT03 weighs 600g, Acebeam X80GT weighs 330g, ROT66 weighs 256g. Extremely good heat dissipation. Mine was modded by TA with the 4000k 80CRI 70.2 and TA driver. Love the thing. It is much floodier than the ROT66.
MT09R is similar to MT03 with good throw. Love it too. But it is much bigger.
Eagtac MX30L3-C although has 219B 4500k, the tint is nowhere near as nice as the 219B 9080 version in the ROT66. It actually looks greenish next to the 9080. It is also not as bright but much more throwy.
Thanks. I wasn't sure what the purpose of it was, but thought maybe just as an extra protection not to damage
the battery sleeves or something like that.
That is quite a few soda-can-style lights. What do you use them for?
I have a few also, but not that many. Original Skyray King, Blackshadow Terminator, Meteor M43, BLF Q8, and ROT66. But I pretty much only use the BLF Q8 and the ROT66. The Q8 is because I have a 3D-printed diffuser cap for it so it works really well in candle mode. And I use the ROT66 because it’s smaller and has a gorgeous 219B beam.
belt, suspenders, velcro, and elastic waist tabs? 
Damn skv, you got a nice collection.
Newlumen, I see from your new avatar that you must really love your ROT66
ToyKeeper, I actually hardly even use my soda-can lights. I used them a few times for work but they are actually too big to carry around and I need to take pics with my other hand so I stick with smaller lights like TC20, C8F, Armytek headlamps, Acebeam H15, S2+ etc. I have used the soda can lights to ceiling bounce for indoor picture taking and took it out with friends to play around with. Otherwise I just enjoy collecting lights. It’s flashaholism at a feverish level. Hopefully I find good use for them some day.
My mistake. It was twisted raven who has the LH351D version.
Thanks for all the comparison info!
Actually I am getting my rot66 Samsung 5000k from skylumen54 Friday.
What is the difference with the skylumen rot66?
He just installed 9 samsung 5000k led and warranty. Thats it. Basically i am paying $100 to do the job.
You like the ss 5k better than the xpl-hi 5k?