Hi,
I have added some features to the indi_celestron_aux driver.
1. direct mount USB connection.
2. cordwrap position computed by alignment subsystem.
3. autoguide: the code is roughly copied from Rick's driver indi_celestron_cgx.
Unfortunately, I haven't any checking setup, so they compile and run without fatal errors but the functionality is completely untested.
If someone brave and patient wants to try them, the code is here github.com/fabriziop/indi-3rdparty/tree/celestronaux_eqtrack