goldy ... I bet I can guess!!!
I have just moving over to these units from Speed Passion and found the same issue, it is however easily fixed!
What you need to do is set the reverse percentage to 100%, even if running in forward only. It seems that due to the fact that brushless speedos actually drive reverse current in to act as brakes they need to be able to use the whole range of current to get the best retardation.
If you have easy access to brake end point on your transmitter once you turn the reverse level up to 100% then also set the maximum brake force to 100% and turn it down on the transmitter. If not set the maximum brake force on the controller.
I must admit that there are a couple of little points like that where the manual could be improved but on the whole I am very impressed with the performance of the ESCs.
I have an Extreme Stock and HobbyWing 13.5T in my touring car and with careful setting of the 'turbo' features it like a missile but still very drivable.
In fact I am experimenting with the turbo & timing settings on the 1S and V2.1 units with the modified motors in the off road cars as way of giving a 'tunable profile' and although there is more to do I am very encouraged with the results so far.
I have made the cars feel really smooth yet if anything they are quicker on the top end than with any previous setups ... but that might just be the Orion motors I am playing with!
Also by doing the above everything runs cooler as a buggy is only at the top end of throttle for a small part of a lap the reduced timing in the lower parts of the throttle = less heat generated.
If you need any more help just shout!
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