That is quite intense!
Suggestion: IMO Play and Stop buttons need to be somewhere less…‘busy’…to access. The lower left corner (as the current models are) is great in case you are in a dark or poorly lit space with the adrenaline of performance rushing through your skull and in your excitement you need to push a button while ‘in wacky perfomer character’.
ie - it needs to be in a place that you won’t accidentally hit that encoder. 
Just a suggestion.
That’d be a thing I’d worry about because when I perform I get a bit…excited (read: sloppy). LOL