My redline gen2 is working just fine. Im top 5 in my group for 17.5 boosted 1/12 with it. No worse than my d3 just different power band and likes different boost. Also had success with sonic with 1s rotor.
In 2s the stock rotored reedy is pretty good. Gonna get a redline gen 2 torque to try too.
All about driving style though.