Hi Martin,
Thanks for that info. I realise this controller is basically an antique and finding info is difficult. Just what I needed.
Cheers,
Ian

HI Ian,

Is this what you need.

ARISTO-CRAFT SPEED CONTROL WITH REVERSE B.E.C. SYSTEM Working Voltage 5.0 V to 9.0 V Continuous Current Forward 20A Continuous Current Reverse 10A Reverse LED Indicator

https://www.worthpoint.com/worthopedia/aristo-craft-hitec-speed-control-409767809

Martin555.