rf brake shut off?

[ncracer1st]

who uses a rf brake shut off or is a smaller piston caliper on rf work better?

[DirtLM]

I have a smaller RF caliper always on the car, perportioning valve on RF line, and an electric shot off from Allstar on RF line. As the track changes I have options. Shutting the RF off is an extreme adjustment but needed sometimes on a very heavy track.