I RECENTLY GOT A .40 P99. THIS WAS THE FIRST OF TWO WALTHERS. I DON'T KNOW MUCH ABOUT WHAT ALL IS AVAILABLE FOR THEM YET. I SAW THAT THERE IS A COMPENSATOR FOR THE P99. IT SEEMS PRETTY EXPENSIVE, I GUESS YOU HAVE TO GET A THREADED BARREL, THEN SEND IN YOUR BARREL AND SLIDE TO HAVE IT FITTED. ARE THERE ANY AFTERMARKET DROP-IN KITS? HAS ANYONE HAD OR USED A COMPENSATED P99? HOW ARE THEY?