I have a Taylor trumpet and have been having trouble with my vavles. I have cleaned them and everything very thouroughly and they still stick every once in a while, but enough to cause problems. I don't know what is wrong with them, and when I bring it to a repair shop they never can do much to fix it. Are there any books around about trumpet repair? I am tired of trusting my trumpet into someone else's hands and want to be able to fix it myself. If anyone could let me know of any books that I could learn from on the subject that would be great. Also if anyone knows a lot about Taylor trumpets and could let me know what might be wrong with the valves, that would help a lot too. Thanks- Ashton.