Update

If anyone have purchased the ELF 30A ESC with the 3550KV Brushless Outrunner motor with the 13t pinion.

http://www.ehirobo.com/shop/product_...oducts_id=4909

Do Not, I repeat do not use the 13t pinion with your 36. It will eat up your main gear, because it doesn't mesh right with the 36 stock main gear.

Instead use these pinions available at HeliDirect.

http://www.helidirect.com/product_in...roducts_id=377