Ah, it's a really old 3 phase Viceroy that was actually at my old secondary school from when it was built in the late 50's. They had to get rid of it when it was obvious H & S wouldn't allow kids to use it as it was too dangerous. I had to fit an inverter to it which meant I'd got variable speed in both directions. All it cost me was a food platter as the chap that sorted it out for me was a member of the Sealed Knot Society, and of course the price of the inverter (about £120). It is really robust and will probably see me out.