Looking for setup advice on my Krytac MKII, SPR. This is my tinker gun, try new things, waste some cash...lol. So far, Prometheus 6.03 barrel, ML 70 bucking and Airtech studios R hop arm. Broke the barrel c clip, so ordered a two pack and some more parts to toy with. Elvish Tac R hop for my barrel coming, here: http://www.elvishtac.com/r-hop Airtech Studio arm here: https://www.airtechstudios.com/prod...at-hop-compatible?_pos=6&_sid=831d7174b&_ss=r So, my question is this. I have a Prometheus and mad bull bucking on the way. Since I have the Elvish Tac Rhop and the R hop arm on the gun, the bucking needs to be "flat" where it is exposed to the window, correct? In other words, the r hop arm pushes down on the bucking, the bucking onto the elvish tach and the elvish tach is what contacts the BB to provide R Hop, correct? The inside of the bucking should have no protrusion into the Elvish tach, just the arm contact point? And folks, this is why I bought a second Krytac to leave bone stock other than aesthetics...lol. The point of tinkering with my SPR? A. Learning at my pace. B. Winter...can't ride the bike. C. Tinkering, it's in our blood. D. Very little money spent on a new hobby having fun.