thanks Bruce for your reply.
We're about to add a third scope and a second PC to our remote system, which has just one mount. Depending on which scope we are using, one or other of the two PCs will be controling the mount. The mount will therefore be a device controlled by the Ascom Remote Server, to allow either PC to be in control. The same goes for guiding, either an OAG on one of the scopes will be used or a guide scope on another scope will be used. Whilst the mount will be commanded via the Ascom Remote Server, I've had to make a direct connection between the mount and one of the PHD2s.
This may well work with no issues but it would "feel cleaner" if PHD2 also connected to the Ascom Remote Server.
We haven't been able to test the current configuration due to the prolonged bad weather.
Hope that makes sense.
Ian