It seems like all you guys are running YS 80's.
I have one installed in a Freya and when I go to lean out the engine the plug gets burnt out. If run rich to keep the plug for more then one flight its has no power. Whats a good needle position for the hover and hi speed needles? Engine currently has about 20 minutes running time.

Guess I should have waited for the hobby shop to recieve the OS .91. They sent them to the states first.