Reply to Timecode Control Toggle

Can anyone tell me how I'd set up a switch for toggling between Timecode Control of 2 decks? I want to toggle between Deck B and D.

I've had a bash - but I'm getting in all sorts of trouble!

The functionality I want (attached to the deck toggle switch on the Zomo MC-1000) is:

Timecode control of Deck B.
Flick switch, and Deck B switches to internal mode, and Timecode Control switches to Deck D.
Flick switch again, and Deck D switches to internal mode, and Deck B switches BACK to timecode control.

I had some success - but it started to get confusing when I tried to have Timecode Control turn off and Internal mode turn on on a single deck.

This is the key for me to use 4 decks with control vinyl. Can it be done?