Finally made mine. First good point. All pieces suggested fits fine. BUT plastic is rough. But if you sand it, white plastic shows. This is very annoying.
Then, there is no easy way to fix the DNA screen. This is pretty annoying too. Then finally, no space to pass the battery cables from the bottom. As result, I had to cut the bottom of the insert. This is an issue as now if there are some leaking, it will go straight to the cables...
At last, but this is my error. I ordered a fatdaddy BF UE. It is larger than the classic one. So I also had to enlarge the box.