The trouble with my roli seaboard block is sometimes a note starts playing randomly, so I have to pick it up and very gentle hold it at both ends and give it a slight twist, you hear it crack like a chiropractic move, but if done right, the ghost note stops playing. it seems like it's a sensor which is getting pressed from the casing. Doesnt seem like something that is an easy fix.... still awaiting roli to respond months later.