Oh, another point about AeroWorks is that due to the lightweight you can power the planes with smaller engines. Well with engines in the lower end of the the range the plane was built for. The Extra 260 can fly very well with a 61FX whereas the Rev 70, due to the extra weight, would really do better with something around 90 size.

The fellow at our field that has all the AWs power them with 61s. I kidded with him one day and ask him if he had a case of OS 61s on hand I plan to put a GMS 76 on my Extra 260 and see how it does.

How many other 60 size airframe are tested with a 60 size engines? That would be a good forum topic [8D]