Yeah me and him talked a lot about this. They sent me a second set which did fit slightly better. (I still had to modify the levers, and the gun to get them to work) He was building the levers off a gen 1 gun and evidently there may be some slight dimensional differences in "some" of the gen 2 guns. (we think)
They were super nice about it, and I sent my original levers back so he could try them on his gun to see if it was a production thing, or if it was my gun on the end of the tolerances spectrum.
The original set took both thumbs to turn them. They were binding on the pointer side and the lever arm side throughout the rotation on the housing. It would also not make the full movement into the notch to go on safe because the arm/tail side was hitting the housing.