Hi Petrush,
Yes I actually did and now have a very reliable system for the last 12 months or so with my CPC1100. I can sync/align the mount remotely from a cold power on.
I wrote my own mount control software from scratch which runs on a PC in the observatory. Its the same PC running INDI and Kstars. I called it AUX-REMOTE. The handset for the mount plugs into the PC via USB and AUX-REMOTE sends AUX commands directly to the mount's motor controllers through the handset. Essentially the handset is not used except as a convenient cable to pass commands to the mount. If I had the correct cable I could have plugged directly into the mount and not used the handset.
I also wrote an indi driver for this mount control system....
So basically they way it works for me: EKOS talks to the INDI driver. The INDI driver talks to AUX-REMOTE which talks to the motor controllers over USB. It is an extra layer of software between the INDI driver and the mount but for me its working really well.
Park and unpark work perfect. Once it unparks, it sends a sync command to the motor controllers to tell it where it is pointing. Guide, slew, track work perfect, I even implemented PEC training but I actually dont use it.
If you want more info on it, the code is here,
github.com/dokeeffe/auxremote
Send me an email/message if you need more info.
Derek