The same thing can be achieved with straight methanol. The idea, amongst most, of using nitro is the extra power to be had. So we add nitro, then run it rich to overcome the effects of nitro?
We are talking about 2 stroke model glow engines, not bonneville racers, drag bikes and certainly not drag cars. There is a remarkable difference in operation. I have personaly seen the end result of a nitro induced meltdown years ago, and the engine DID melt. 60 % nitro was used, unknown oil/oil content. It was a CL speed engine where speed meant everything and the operator obviously went just that bit too far with a lean run.

I constantly hear of nitro being a cooling agent in model fuel, well it may cool the crankcase incoming, but it's what it does in the combustion chamber that has far more importance to me. Energy = heat the last time I looked.