I have 2 MKII 22/45 the Kinghouse did a grip job on. He also did the triggers and a few other internals with Volquartsen parts. Turns out I ended up shooting last weeks Ruger rimfire challange with my MKII. The grip angle more closely matches that of the open Glock I'm shooting now. I added a ported Volquartsen upper a few Volq. internals a ultra dot and a slide racker.
My advice, put something together, learn which ammo shoots best then shoot the crap out of it.
Volquartsen is selling off their inventory of discontinued uppers for 250.00 . Not to bad of price. They are aluminum and in my opinion go a long way toward improving the balance of my MKII.
Bill