Nice looking weapon. I have been thinking about building one of these for years...not because I need one but because I want one. Have you fired it much yet? How does is behave?
I put 25 or so rounds through it before mod'ing it. Putting on the ACE stock requires cutting the tab off of the rear trunion. It's kind of a once you commit you are in sort of thing. It's very much like any semi-auto 12 guage in term of kick. We just finished my dad's up today.