I'm not sure why I didn't just plug in one of my momentary switches lying around in to just see. Clearly the system settings show A-D, X-Rev, tails, etc as being switchable.
The largest challenge for me is just remembering all the different effects I have available and it's associated switch (I-IIII). In the end it's a low investment for me to add four more switches to make it mildly easier for my brain. It's still not perfect or necessary efficient, but what I'm going to try for now.