After reading a post about the Ebay trigger kit I stupidly searched for a 22/45 trigger kit and bought it... then noticed it was listed for a MK3 not the MK4 that I have. I sent a message to Volquartson as soon as I noticed but have not heard back yet. Are these two kits compatible or am I out of luck? Yes I know, not my best moment. In my defense, the bourbon was really good before I clicked buy now...