we had a gun upgraded by bartek not too long ago, and he was spectacular with it. we just walked in when he happened to be working and bam, he said he'd do it right there on the spot. the best part was that he said it would probably take him a week to get back to us, and then he called us the following Monday (we came on Friday). the gun worked flawlessly, and even shot at 420fps a few times (it was usually a consistent 391).
great job, maybe you just got a lemon fix...