I use a DSP for my laser control and swap out the Y axis for the A (rotary) axis.
I save a separate config file for rotary and flat cutting after setting them up and then just select the config I need for a particular type of job and import it into the DSP.
It's very easy to do but you need to remember which one you used after swapping them back. :-)
I use 4 pin plugs made for microphones and wire them up so I just have to plug in which axis I need after setting it up before hand. Do turn off the machine BEFORE you disconnect the leads as most stepper drivers don't like to have nowhere for the electricity to go and will burn out.
Rich.
I am not completely useless.......I can always serve as a BAD example.