Thinking deeply about this:
I cannot see how I could not use an ASCOM hub;
SGP has to control both PHD2 and the telescope and the main camera. The
telescope (EQMOD) delivers the RA+dec so there has to be a common
connection for both and the cameras.
I could eliminate the outside hub by using 3m lengths of USB2 cable
feeding the laptop, or even bringing the USB hub inside using similar
cable lengths - but I cannot see how the ASCOM hub could be eliminated.
regards
Lawrence