Allen, The piston are accessible for repair, however, the wiring harness is tight and it can be a bit tricky. -- noel jones, aago athens, tennessee, usa ------------------------------- frog music press rodgers organ users group www.frogmusic.com Just Published! Using the PR-300 Sequencer Voice Module by Frog Music Press ---- To unsubscribe or change mail delivery (digest, vacation) go to www.frogmusic.com/rodgers.html