I've been making my own fuel for the last 50+ years and have only ever used nitro once and that was for a racing competition. Nitro does give a bit more power and makes the needle easier to set because nitro will tolerate a very large range of mixture settings, meaning it's not as critical as straight methanol (petrol of course is far more critical). The downside is that the fuel consumption starts to go way up as you add more and more nitro, it's an air/fuel ratio thing. Nitro can also help give a slower idle but how low do you really need it? I figure if the model doesn't creep forwards (on grass) then it's low enough
. If you want though you can add about 3% acetone to lower the idle speed a bit.
Edit to add: Oops, just remembered this is the CL forum, who cares about idle?
