Posted by Mark F. on November 19, 2000 at 12:59:10:
In Reply to: How about a 3 rotor + 1 thumb rotor 4th? posted by James Soh on November 19, 2000 at 10:22:21:
It isa good question. One of the advantages I could see from this setup would be the 4th valve dould be placed furthur down the conical tubing, making it eisier to make thge 4th valve bore bigger than the other 3 valves, making the low register more free blowing.