Non farlo!..rovini in modo definitivo il bocchino, non basta allargare il foro, purtroppo altre cose devono andare di conseguenza aggiustate..es . la gola il back bore etc...credimi ti ritroverai con un bocchino inutilizzabile...è meglio che se ti piace il rim e la tazza acquisti un'altro bocchino con il foro più grande se c'è a catalogo Tilz..oppure ti rivolgi ad altre marche..Es.Monette
Comunque lo strumento da usare è un'
alesatore conico micrometrico a mano, e poi sperimentare allargando il foro di quanche manciata di centesimi per volta..leggi questo argomento:
http://www.dallasmusic.org/gearhead/Mouthpiece%20throat%20size.html"How large should I enlarge the throat?
Who knows what will work best for you? The best advice is to do it one size at a time. Open your #27 to a #26, play on it a while (more than 10 minutes in the shop), then perhaps open it to a #25, and play it is some more, and so on. When you get to the point that it is perfect, stop. Or when you get to the point that you liked it best the way it was before you opened it last, buy another and have it opened that much.
Some folks find doing this in descending pairs is more instructive, i.e., starting, say, with two Schilke 14s with standard #26 throats, open one to #25 and compare it to the standard; if you prefer the #25; have the standard one opened to #24, then compare; if that is better than the #25 and you think even more open would be even better, then take the #25 one and have it opened to #23. If you find that that is too big, you still have the other one at #24, so play it and make beautiful music. Try to sell the one with the #23 or hold on to it; after you have played the #24 one for a year or two, the #23 may be just the ticket. Or maybe not. Sell it then."
