A guy I met at the SC state rally said that the Logo
lettering on some models is affixed by way of barbs
that penetrate the skin. I have a mystery leak that
may be explained by this, but haven't had time/weather
cooperation to try caulking the letters.
Most of my other leaks came from the roof
penetrations, not the seams--which is not to say that
they couldn't leak. But, take some time to inspect
the roof penetrations. Sometimes, the problem is
apparent if you get up there and look around.
Jon in SC