I recently got my cornet back, from when I was a kid. It's in bad shape and the valves were completly stuck. I managed to oil it up and "coax" the valves out - possibly with more coaxing then I should have used. I used a socket that fit into the shaft and was close to size of the valves and gently tapped the valves loose, then, under the advice of my sons teacher, I cleaned the whole cornet in a bath of luke warm water, scrubbing it with cleaning brushes. Now that its mostly clean, I re-oiled the valves but the number 1 and Number 3 will not fit back in. There is a ridge half way down the shaft that the bottom of the valves will not fit into. The number 2 seems to be ok. There does not appear to be any obstruction in the shaft or on the valves, and there are no dents in the outer valve caseing. Do you know why they won't go in and how to fix this? Is this fixable at home? If not, Is this an expensive fix, or is it even fixable. This is a selmer bundy horn from aprox 1974 I had it when it was new but it has been out of my hands for the last 30 years or so. Added after my second post: I just looked up the numbers on Horn-u-Copia to verify the year I got the cornet and there were som discrepencies. The cornet was new when i got it and that was in around 1974 or 1975. despite this, Horn-u-Copia lists that serialo as dating to 1960-1963 and prior to the time that selmer bought bundy. Despite this fact, the horn does say selmer and bundy on it. I suppose it could have sat on the shelf for 11 or 12 years?