HORN-WHISTLE-BOARD.COM

Dana you posted information in Adam's board about spinning brass horns to change the length of the throat, specifically Grover 16XX series. I've been tinkering with it some myself and the results have been less than wonderful. If you could post that information here it would be of great service. Thanks

My Grover project came to a standstill a while back. I PM'd you my phone no to discuss.
https://m.flickr.com/#/photos/great-american-horn-machine/7031730665/sizes/o/