how do you balance a plane laterally? I mean how do you tell if one wing tip weighs more than the other? I have a seagull 540 edge that likes to roll out of loops, but I can't figure out why. I have tried to make sure that the elevator is measured correctly, but the only thing I can come up with is that the plane is not balanced from wingtip to wingtip. How can I tell if this is right? Thanks in advance for your responses.