Thanks for digging a bit on this Brian. The reference you sent refers to the serial line protocol, which I investigated and it definitely suggests the command set for Gemini supports this if you know the correct tracking rate divisors and other physical parameters for the mount. Im guessing the divisors on the handset are effectively this value, but using the handset for this repeatedly or on a regular basis may be a pain.
My new G811 is still on order so I can't noodle around with it myself yet. As you say, my AP could do this, but its not very portable :-)?
I am assuming I can set a non-sidereal rate in the TheSkyX, as there is a provision for that there, although I have not used it, I will give it a try and report back on my findings.
Thanks to all for their help.
Best, Ed
