I recently bought a model 4-1200. I just replaced the CAV-110 quick drains in the wings. The left drain was weeping fuel prior to replacement. The old drain came out very easy but the new drain will not snug up and just keeps turning as I attempt to tighten it. I have not put hardly any pressure on it so I think this is why it was weeping. The new drain is not stripped and so I assume the fitting in the tank is stripped or has come loose and is spinning. I did not build my plane and do not have the original plans for it. I can't really see how/ what the tank attachment is without cutting the wing covering which I obviously don't want to do. Has anyone built one of these tanks or do you have plans which show this area? Any help on this would be greatly appreciated. Thanks!

Randy