Are there any concerns with warping, either through heat or just gravity?
So far so good, I've ran through a battery pack already with it and it seems to be holding up. The hilt pieces are a little hard to see in the pictures, but the body is 3 separate pieces of Poly-C, and it's pretty thick, so I doubt it will warp. It's surprisingly rugged.
The heat sink is a TCSS heat sink and it works great. I have yet to "feel" any heat on the outside of the hilt, and I ran it for quite a while yesterday.
Time will tell though, ....but I think it'll be OK.