Have a CW40 with an OD green frame and black slide. 700 rounds and the only problem I have had has been feeding issue with aftermarket mags. With Kahr mags, 100% reliable. Very accurate pistol and no problems with HP.
I have polished the extractor and feed ramp, no other mods. I have an extra recoil spring and extractor on hand.
I have only the one Kahr, as I mainly shoot CZs. I just found this forum and love the wealth of information. I appreciate everyone contributing.