I have some info on using KHE Dubz with a Suelo V3 frame that might help others who might use the same combination of parts...
The machined "block" of the Dubz that fits into the dropout thicker than the dropout. It's not a fluke...one of the Dubz I had was older, and I just bought a brand new one. They are both thicker than the dropout.
You can't leave it that way because when you tighten everything down, the extra material on the Dubz prevents everything from completely touching the dropouts. I had my axle nuts cranked and I could still move my pegs with my bare hands.
So, I took a hacksaw and cut off about 2mm or so of the "block," nearest the axle hole. Grinding the block down won't work because you'll grind away the tensioner bolt hole. Anyway, after doing that I rotated the axle so that the flat parts of the locknuts were facing the tensioner, and they fit perfectly.
Just thought I'd mention this. Maybe the Dubz work fine with other frames but I had to modify them for the Suelo.