Let me start by saying I'm almost embarrassed to ask about this. I've had a 40P in my gun safe for 9 years and have only shot it once, I'm not a big 40 cal fan. Now that my son has caught the CZ bug we went through my safe to teach him proper take down and cleaning of the different CZ's I own. Having my PCR, P01 and 40P in pieces on the bench, I realized the P01 and 40P have the same frame. Has anyone used the 40P frame with the P01 upper? Or visa-versa? How about the Kadet kit? It would be nice to use the P01 lower with the 40P slide since it has about 8000 rounds through it and the trigger is silky. I guess next time we get together we are going to be doing some mixing and matching. Thanks