THat's sort of what I figured, but I wasn't sure if people were mowing it tighter or something. One more question (at least until I think of another one), is there a general rule for whether or not a plane will be able to operate from grass? Obviously landing gear would be a plus. I know the parkflier stuff I've been playing with does fine on concrete, but there is no way you can operate from grass in any normal capacity, due to the light weight, low power and small wheels. Is there a weight/wheel size/power or combination of the three that is the cut off point between being able to fly from grass or not? I'm sure a 1/3 scale cub should fly fine from grass, and I'm guessing something like an GP's Electricub won't. What about a .20 size or .40 size?