Thanks for the info on the MK parts. I installed a Volq sear and Clark trigger on one of my 3 MKIIs and it's awesome. I'd describe my kitchen table gunsmithing skills as decent or better, and I have plenty of tools and polishing/grinding equipment. Fitting the Clark trigger took a fair amount of time, patience, and precision, since it requires fitting side to side and otherwise. The result is awesome, comparable to SW41s that I've shot. I want to upgrade the trigger in my KMK10, and think I'll opt for the Volq in the interest of time and ease of installation.