William thanks for the hints here. I hope they will help James.

I should mention (for others that read this, not you :-) ) that the settings for the 2X adapter are not part of ACP and not accessed, changed or kept by ACP. The only access is from ACP calling out to the ASCOM chooser, which then calls out to TheSky to access its 2X adapter and its settings window. Two degrees of separation :-)