Oh ok thanks alot...its just my engine seems so much more quiet in the air than when it was before in my trainer....

My engine definitely has no trouble with cooling...i mean the whole front of the cylinder is out there and so it sticks out of the cowling...it never quit on me due to any overheating...and the tank is perfectly centered with the needle valve....and starting is easier after having run 3 tanks on it.

Good to hear there's no problem in the inverted position then...