I've switched to a set of foot pedals, one for scrolling up and one for scrolling down, and it's great to be able to move around without doing anything at all with my hands.

That's cool! I use a footpedal as a supplemental click. Also have a second mouse (one on each hand) so I spread around the wear.

I modified my pedal so it just takes a very slight twitch of my toe to use it.

What food pedals/controls do you use? This seems like an under-utilized input channel.

Cheap ones: https://www.jefftk.com/p/how-to-set-up-foot-pedals