During the course of corresponding with an Ill. lady whose son dropped a piston belonging to his Barrington trumpet, which she bought somewhat on the strength of my reviews on WWBW there were a couple on interesting factors. I think the problem was a slightly whacked lower rim of the piston. 1. Conventional music store Pooh-poohed the quaility of the instrument and said they couldn't fix it. (expected result) 2. She found a instrument repair shop in Urbana, took the horn there. They fixed the problem and said there was nothing wrong with the horn's quality. Her son is now playing again and she is inspired to maybe getting a horn to play with him, after trying the temporary loaner they got. 3. The name is deharo horns and de Haro Horns - Custom Horns, Leadpipes, and Brass Repair - Modification, Custom Mouthpipes (Leadpipes), Screwbell Conversions, and Valve Rebuilds (Plating) Brass Instrument Repair Brass Instrument Repair Brass Instrument Repair Brass Instrument Repa He evidently concentrates on making custom French horns, but does repairs on other brass instruments, as you can see by perusing his site. Maybe some of you have heard of him. Possible another midwest name to keep in mind as a repair option for some things.