Steve,
Thanks for the reply. For some reason I did not receive a notification email when you replied to this thread; sorry it has taken me a few days to respond.
As I said I am setting up a dual scope/camera imaging rig. I will have two scopes and two cameras operating from the same computer on the same mount. I have one EFW2 and would like to add another, however I need to be able to control both filter wheels from the same computer at the same time (via ASCOM).
I suspect that the ASCOM driver does not support multiple filter wheels but I wanted to make sure.