I think your wastin your money on 30%... save it for the 4C guys.

Cool Power 15% or any number of current 15% fuels will give you plenty of power and protection.
About all the nitro is going to do for you is maybe give you a better idle depending on conditions.
Plus your going to wear out more stuff... plugs, rods,rings.

You will find that 1.60 will haul any pattern plane you put it in.

My Mintor 1.70 will run just as good on 10% as it will on 20%.

Wayne G.