A.J.
First of all, thank you for your prompt reply. Even with the FS6, I don’t think you can do it. Try to get an X1 O.S. [ORIENTAL] version 4.0 and enable the Scale box from page 2 of the Utility menu, when you go back to the 1st page in Utilities, you’ll find the footswitch button (feature) disappeared (For both FS13 & FS6) !!
Which means that the port could only be assigned to ONE device at a time.
You can only have either/or device. I think Ketron should have used another port for the scale converter that is not used during the normal X1 use (The computer interface port for example).
I really wish if you can look into that while wriing the new Oriental O.S. Please let me know if I can be of any help.

Maged