As for using reverse to slow down. I don't know how well that would work. It seems that may cause issues but I really don't know. Maybe Alan can enlighten us on that one.
I would be slightly hesitant to actually try it out in case it did cause damage to the controller, as I envisage it would be akin to forcing a stalled motor to turn in the wrong direction.
Whilst it might be OK at slow speeds, I'm not so sure it would be a good idea braking quickly from higher speeds.
I just don't like the thought of rolling a bike backwards at speed down a steep hill and then trying to stop it by only applying the throttle.
![Undecided :-\](https://goldenmotor.com/SMF/Smileys/default/undecided.gif)
Most motor controllers for R/C cars have an inbuilt motor braking function, but I suspect it works differently to simply applying the throttle in reverse.
I wonder if it's possible to use a R/C car brushless/sensorless motor controller:
The controller could easily be operated by a conventional RF Tx/Rx instead of Bluetooth.
A working current of 200A and a burst current of 1000A sounds pretty good to me, and could be a whole lot of fun in conjunction with a Magic Pie!
In fact, I could almost be tempted to try one of these controllers just to find out whether it would actually work.
![Cheesy :D](https://goldenmotor.com/SMF/Smileys/default/cheesy.gif)
It would be interesting to find out what the Magic Pie's maximum rpm would be using this controller and an 8S LiPo pack.
Alan