Hi, Everyone! I've pretty much eliminated every possible issue with the "vibration" issues, which I believe are all too common on Committees. No trouble with the bracing, and I had a leak addressed in the 1st slide crook when I had the trigger removed. (There was a screw hole right through it.) I was reluctant to send the horn back to my tech, as I wasn't certain what the issue is, nor could he reproduce the issue when he played the horn. I played the horn for about an hour after getting it back from him, and even told him that it was good to go, but after being completely warmed up, the trouble started again. I reached out to Harrelson, and ordered one of their gap solution kits, which didn't solve the problem, but pointed me in the right direction. Reducing the gap actually shortened the length of the standing wave that starts in the entrance to the leadpipe. Actually, it made it more noticeable, but at the same time, it told me that this was indeed the issue. So, the question is, do I have him move or replace the receiver for no gap? I switched to a Monette mouthpiece a few months ago, and they do typically have a wider gap in most horns. I don't have any plans of selling the horn, but this option would make the horn pretty much married to Monette mouthpieces, unless I have the receiver moved again. My other option would be Harrelson's VGR, which I feel are a bit clunky looking, and would involve moving the bracing. My tech has already tried to steer me away from this option. If this was your horn, what would you do? Any feedback would be greatly appreciated. Thanks!