iv been playing my trumpet for goin on 7 years. iv learned that instrument from the inside out. i have a 4 octave range( from double pedal C to double C), but for some reason i cant figure out is on every mouth piece of feel either traped or not supported. i currently play on a schilke 14a4a i use this in concerts and other events and i feel just so trappedin side the mouthpiece. i also play on a mellophone mouthpiece called a mello 6 and i dont feel trapped just not supported like i do with the schilke and all my other mouthpieces its the same way either trapped or not supported. is there a site or a manufactor that will let me customize a mouthpiece FULLY and if i dont like the way it is send it back for changes? or is it just me and my mouthpieces are perfectly fine?