I have the MVVS 35cc gasser, and it's far from cheap !!, it's made as well as any motor I have seen and better than most,,, I get 7500 RPM with a Zinger 20/8 pro, that's is what some have posted for their ZDZ and Brison 40's,,, we stopped tuning at 7500 because the motor was still new, I have no idea if I can get any more RPM out of it, but for now I don't get any sagging in my straight-up climd-outs, I have it in a PA GeeBee Y (ARF) (this plane weighed 12 pounds 8oz with an OS 120 and 8oz of lead in the nose, I don't know what mine weighs),,, there are heavier and lighter motors in it's class, so for weight it's right in the midle, you will be happy with it's quality, is superb.


Jim