Have my machine up and running with 2 spindles.
Installed a relayboard to take care of the swapping and made the link with the outputs needed in my module.
The hard thing was to swap the spindle range. It would not want to use (swap) the data in the table.
I've used some Api's to force the spindle settings when switching from s1 to S2.
Problem solved!
Thanks,
Keep Safe,
Adam