Maestro VFO A tuning knob

The tuning knob for VFO A on my Maestro jumps, stutters, freezes, and sometime goes backwards.  VFO B works perfectly.  Tim sent me a replacement weight for the knob but that did not make any difference.  He told me to submit a trouble report.

 I have had this problem through the last three Alpha software releases.  Now on V1.11.3.

Maestro serial nr. 5315-5091-0100-0035.

73...   Bill Axelrod K3WA