That's very interesting news.....the 10% nitro fuel should be cheaper. From my nitro car experience I've learned some good nitro lessons.
#1 The lower the nitro content of the fuel the leaner you have to run the engine to produce good power. But guess what?.....the lower the nitro content of the fuel the cooler the engine runs and it will tolerate the leaner settings required.
#2 The higher the nitro content of the fuel the richer you have to run the engine. If you tune the engine to run well with 10% nitro....... then change to 25% nitro without re-tuning the engine it will be too lean to run or will get so hot it will sieze.
#3 The cooler the weather the lower the nitro (this is a vmax7 thing). In the winter time you can run lower nitro......it's about the same as adding shims to the head in cooler weather. In the warmer months higher nitro seems to produce more power....once again about the same as removing shims from the head.
Anyway these are lessons I have learned.....so I would say that if the vmax lifts the heli and runs reasonably cool then all is well. BTW did you know that you can buy the oil formula for the Omega fuels? We used it alot because the "racing" fuels that the LHS stocked only had 10% lube with 20% nitro. Even O.S. engines require more percentage of lubrication than 10%. We would just add several ounces of the Omega lube to raise it to 18% or so.
Mark