I run disks that are made for the 8ight T. Do not attempt to use these type of brake setups for bashing or with servo's that have less than say 180oz/in of torque. That being said they have the most linear and easily modulated braking action I've ever felt.
This worked great but then glazed over, I went back to stock 8ight T brakes. I think this one would be fine if I went back up to +30 on my exponential along with some other linkage changes I have made recently.
