Appeal to @Akai_Pro EWI players (if you don’t know what an EWI is, just ignore this message and please do not reply). On my AKAI EWI Solo, I suspect that my left thumb is not making reliable contact with the two knurled octave rollers. The symptom is that, on this octave and this octave alone, I continually find the instrument dropping to the octave below, and it’s very annoying. Has anyone else encountered this problem? And do you have a remedy?