Coming in late Pete. Rob tried his heq5 eq-dir thing at martins unboxing and it did not work. No usb-serial was available to try pc-direct. Someone suggested it may have moved from 5v ttl to 3.3v ttl signalling, but it's the same handset so I doubt that one. In any case I made up a 3.3v blue tooth thing to try.
The celestron unified ascom driver lists skywatcher as a mount in it's setup and it is the driver recommended in previous manuals. It does not use pc-direct so all handset functions still work if you use that. It connects via the serial aux port on the handset.
I'll know more when the mount arrives
Did you get one as well?