I have a few vintage beatboxes that I'm sorting out. I figured I'd use them, and bought them years ago but they never were usefully employed. I'm after any tips on the values and service requirements of the original Bentley Rhythm Ace and the Korg KR55B. What I do know is that both units work 100% at present. The Bentley has really old school sounds but you can drop instruments in and out and also changed the tempo on the fly (like Arthur Brown did on Kingdom Come's excellent "Journey" album. The Korg was apparently favoured by early Depeche Mode, and is the model with extra banks of rhythms I think. Anyone enlighten me further? I need to find good homes for them and may eventually trade for a decent Fender Telecaster or Jazzmaster. All info on these units gratefully received!