Hi all,
I would like to get some opinions about these two engines, actually any and all "40" size engines that would be good for 3D flying. Specifically, I am interested in quick spool-up from idle on up, and well-mixed low and mid-range running so I can tool around at low to mid stick and not have any problems going to full throttle when and if needed. I have played with some of the Chinese engines, and either get too slow of a spool-up, or less than stellar mid-rpm fuel mixing.

I have witnessed a Webra 50, and was very impressed. I have read several good things about the MVVS engines, but have only seen a 77, which was also impressive.

Thanks