Andy,


I subscribe to everything Ed (Artisan) wrote!

I would only add:

1. Use fuel with 20% oil, half of which is castor and 5% nitro. Not 10-15% like everyone else and less oil.
Castor oil is more viscous and improves compression in ringed engines too.

2. Use a cold glow-plug. like the OS A5, the Rossi R5 (R4 is borderline), Enya #5, or #6. These will allow you to lean the high-speed needle as far as possible and the low speed range will be affected for the better.