Posted by Paul H on May 27, 1999 at 15:13:59:
In Reply to: Re: Re: 3 piston + 1 rotor posted by Jon on May 27, 1999 at 14:42:54:
French Horn players use three fingers and the thumb all the time, and quite successfully too. As Leland mentions above, a rotary valve would be easier to locate as a modification. Designing a linkage for it could be a fun project.