Does anyone have any suggestions on how to break in a tower .46? The instructions tell you how to break it in step by step, but i didn't install the needle( tower 40 RTF), so I have no idea whether it is in leaner or richer. Very confused. Also, sometimes I have no pressure, and the fuel won't stay in the fuel line after priming. Thanks!

Also, when I have the engine running without the wings on the elevator and rudder vibrate significantly..