Thanks,

At present I have two.

I won't be rack mounting them.  More just to change individual presets at the same time, turn one off and another on at the same time, syncing the tempo and sometimes control more than one Factor at the same time with a common expression.  It wouldn't be hooked up to anything.

I would want to be able to use the normal switches, Aux,  and exp pedals for each Factor.

Steve