I admit I have fiddled with the little trim like things inside. But I was very careful and didnt ajust them with the wotty on.
It may be an option to try and ajust them with the wotty on but I am in no rush to get the robot running as next event is over a month away.
I will try a few other possible issues such as low battery even though the motors move obveously quicker when conected directly to the battery.
By the way I am running on 24volts and 300watt motors.
Will wait for a response from Ian before trying anything else.