Digging around in the workshop and came across this - still just about the best speed controller you can buy in terms of drivability and control, not to mention that lovely Vantec 'hum' (you know what I mean)

9 - 43 Volts
75 Amps Continuous, 220 Amp peak

Same as the 47E except lower voltage handling http://www.robotmarketplace.com/product ... FR47E.html

Awesome piece of kit#

Cost £450 originally, selling for £300