Here a review of the new Sofirn SC31 Pro, including testing of water resistance a take on the UI, outdoor beamshots and some criticism:
Great review. The light works just fine with 18350 and a short tube. Also it’s strange you don’t mention the sharp fins.
Yeah, a short tube should work. I have to find one. No, the fins are not at all disturbing to me, I hardly feel them.
Awww, you didn’t blow it up like that other light…
Just got mine like a hour ago. Nice. Not too CW, but a bit green, especially on low settings.
Doing a battery test now…
I didn’t notice them until I read this 
The machining on all Sofirn/Wurkkos lights I know is very good, they really nail it with their threads, o-rings and water proofing which covers the most important aspects. Now I did notice a few sharp edges at times (not on the FC11 of SC31pro but some users pay more attention) and have criticized it with the Wurkkos WK30 where it really was too much on the tailcap and seemed more like a mistake they made. I think it mostly boils down to machining time - you want grooves for heatsinking but to do them extra well must cost a disproportionate amount of time on the machine which translates into money. As Sofirn/Wurkkos does budget lights this might be a trade-off they have to do. But that is just my idea.
Yah, same here.
Definitely something to take care of before insertion 