Hi Chip & Michael,
Just to be sure Chip, you mentioned these knobs for the Altitude Lock on the G11, is that correct ?
I am using the Losmandy FHD tripod top knobs (very similar but with threaded nut, instead of bolt) foy my Azimuth Lock down and they really do make it easier to tighten carefully while doing PA, especially for long FL.
Thanks,
Astronut Tim