I dissagree with some of the above comments. I found it is always best to have the plane sitting at a slight negative angle of attack when at rest. That way, landing will be much less prone to bounce, take offs easier as you gain adequate flight speed befor rotation to takeoff attitude plus taxi is easier. Main gear placement is critical, you want the main gear to be just a bit aft of the CG, to far back and take offs become a problem.