Roland RA800 (desktop module version of G800):
No problems whatsoever

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Technics KN5000:
Loose cable connection to Color LCD tilt screen. Had to open KB and reconnect (tighten) cable. Easy fix.

Broken white key: Caused by object falling on the KB at the club. Relatively easy replacement by me.

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Yamaha PSR2000:
No problems whatsoever.
