I am not the greatest 3D pilot. I play around with a maneuver now and then but that's about it. With a Xoar 17x6 it does climb very well and seems to handle what I throw at it well. The finished plane is actually prett ylight.

I believe there is going to be a review of the Cermark Yak using this engine here on RCU in the near future, I'm sure it will be tested well.

I also think there may be some other threads on it around RCU.