Welcome to the new and improved Proflex / K2 Tech Forum!
Very nice ride! Looks great. Your frame is 18"? Is this measured from the center of the BB to the very top of the seat tube, or to the center of the top tube? The reason I ask is that my frame is 18" from the center of the BB to the very top of the seat tube. But my shock mount hole is much higher up on the frame mount plate. In fact, it is partially embedded into the top tube. I would like to get a Risse shock, but from the looks of the one you have, it would not fit as the body of the shock would interfere with the shock mounting plate on the frame. Anyone have input on this?