I was opting for the .62 but
as many of you have said the larger engines slowed down to fly stunt correct was about where the .56
starts.
Bryan,
I guess what I was alluding to is that larger engines (.72, .62) slowed down to produce the power of .56 will be more stunt-fiendly than the .56 running wide open.
At the same time, the Berringers have shown that the .56 can be used to fly at the World level.
--Mike