I thought that some people here may be interested. I tweaked a QWERTY keyboard and made a foot switch to trigger looped sections live. This means I can play guitar whilst triggering different parts of a song live and also toggling glitch FX.
I ripped many of the keys off an old QWERTY keyboard. I created a bunch of labelled regions in Reaper. I assigned different QWERTY keys to custom commands for triggering looped sections. I also assigned custom commands to some keys for toggling a couple of glitch FX (I intend to experiment more with this).