Fitting the saxophone neck cork. The main thing to remember when fitting a neck cork to the mouthpiece is simple. The neck is a cone with a taper and both the cork and mouthpiece are cylinders. So you must sand the cork more on the side toward the neck register key and less at the end the mouthpiece fits on….
We have all seen the necks where the mouthpiece only goes on so far the rest of the cork is big. Simply not sanded enough at the back end of the cork. The mouthpiece need to go all the way on the cork, not that you will always play it there but it is nice to have a little wiggle room just in case.
Check out my video on neck corks.