Can't remember where, maybe it was me, on an altered plane ( usually catch the plane on Friday after work ), but... the servo's don't operate the tuning pegs. They operate pistons that pull the strings tighter at t'other end by lever, ie, no pegs. It's all nice and neat, housed where the sun don't shine. I am almost certain ( only an idiot IS certain - I'm sure of that ) that I saw one of these nifty little rigs in Popular Gadgets for the Terminally Lazy or somewhere - but where ? Oh well, the plane will be ready for boarding in a couple of hours so I'll ask the flight crew if they can recall.

gnu