I suppose all that’s really necessary to do what you want is to flip the expression dip switch (switch 4 on the main board dip switch). Repatching anything isn’t really necessary if you don’t need to use the tuning jack for your audio signal…you can just keep your expression cables plugged into the tuner/exp jack. I’ve heard of at least one customer wiring a “break-out” switch to the dip switch pads so they could more easily switch them without removing the module. That may be a good option for you. I don’t know where you’d mount the break-out switch, but electrically it should work.
…just an idea.
-Brach