I would have a long hard think about where, or even whether, you place potentially show-stopping functions like start/stop, reset, breaks etc. unless you are VERY good at foot motion without looking at them…

My system with the Roland FC-7 is to put the showstoppers at the far left end, and all the stuff I use all the time at the right, so if it’s at my feet with a sustain pedal to the right, my leg has to travel the furthest to get to the scary stuff!

I used to play organs with foot pedals, and even with that experience, I found that if a showstopper was next to a commonly used switch, occasionally I ended up triggering it. Not good!

There’s a good case to be made that two different sets of footswitches plugged into a combiner for the final Ketron input allows you to place the real showstoppers COMPLETELY away from the commonly used functions like variation selection, fills etc. and virtually eliminate the odds of hitting them.