The LRP Quantum Comp 2 has "automatic brake"; but, I leave mine at a "0" value of the six option settings, being 0-5.
Instead, I dial in any needed drag brake using that function on my radio. It's something that I dial in during practice according to the track conditions.
FYI...As I have become more proficient with my driving, I find that I am using less and less drag brake.
I don't think that automatic brake is a 'reversing function'. I assume that it is more a motor 'shorting function'.
Constantly evolving CRC WGT and WGT-R/T...Carpet & Asphalt...All thanks to Team CRC.