All you can do is experiment with it. Watch out for detonation if you increase the nitro content of the mix. The reason we went to premium gasoline in the mix is that a few engines were encountering some detonation with the nitro in the percentage we are now using. The premium gas solved that. Some engines would be able to tolerate more nitro, some not. A good clue is to watch what an engine does when you disconnect the glow power. If it loses rpms, it most likely could benefit, or at least not be harmed, by more nitro in the mix.

It would probably be easiest/safest for people that can't get the 10/10 fuel to get 20/20 or 20/18 fuel that is more easily available, and then cut it 1 to 1 with pure methanol. This would actually lower the cost of operation even more. Methanol can usually be found through automotive speed shops, go kart racing shops, etc.

AV8TOR