I've had a Pilczuk installed on my 10-10 and I like it. I'm in the way of considering a Pilczuk for my LB Callet NY. The Callet is big and open, the 10-10 a little on the restrictive (in a good way) side. From what I remember, later models of Callet trumpets were experimenting with a Pilczuk-like leadpipe and wondered if it will benefit the horn, it certainly did the 10-10 but that one is of 1958 vintage. Concerned that the Pilczuk would ruin the LB characteristics of the Callet. I have (2) Callet NY horns, one silver the other lacquer, would probably get the modfication done to both. Lee Adams at one time bought out the Callet line, is he still around?