Thats great. I will send you PM, so you send me your address. The most important test is when you ask somebody to do about 4-5 takes including takes with resonator and without. That person has to install it properly, obviously. Then you say which time you prefer the feel and prefer the ability to play altissimo. Then compare with the sheet where it says when the resonator was on and when off... Speak soon. Thanks,While I don't condone your methodology for promoting this implement, I am not completely closed-minded. I accept your offer to try this out. I will attempt a double-blind test and report the results. If I have evidence that the thing makes a verifiable difference, I will be happy to pay for it. Look for my PM.