There is more to tuning the engine then I can tell you over the net. I will try to help in getting it setup.

What glow plug are you using? Have you tryed an Enya#3. The O.S. like more nitro, atleast mine do. I am runnig 25% right now. IT will fly on 15% but the power is down.

My main needle is right at 1 1/2 tunrs out. I set the low end needle by attaching a "CLEAN/ NEW" piece of fuel tubing to the carb and blowing through the tube while turning the low speed needle out just until I could hear the air flowing out of the carb.

Then there is the matter of your pitch and throttle curves. Tese will effect how the engine responds to the load of the blades.

Hope this helps a little.

Dru.