Great to hear you like the gun so far. My EDC has been a G23 for over five years now and the last few years I had been looking for a BUG. I always wanted the PM9 but I couldn't bring myself to spend that much cash on a BUG (I would have if it would have been my primary at times). I ended up picking up the less expensive version CM9 (as well as the desantis nemisis like you) and it has been great so far. Like you, I have been trying to get used to the trigger. During slow fire I have no problem but when I throw a rain of fire down range I'll do the same thing in dropping a shot here and there a few inches. Still effective hits but not as tight as with my 23. Just like any other gun, with a little trigger time and proper fundamentals it will come around quickly.
Congrats again on the Kahr! By the way, may I ask what made you decided to go with the PM9 over other firearms you may have been looking at?