[RetroRich67]

Thanks for this Andy - you have inspired me to revisit my Road Runner. I had been running it with the centre magnet in place, but have just removed it and am playing around with weight placement. I have 3g just in front of the motor at the mo and that seems to be working okay - plenty of controllable sliding! Have to track down some of the Paul Gage tyres next. Just running with scuffed-up standard tyres for now.