I out 4" Eternabond around the entire perimeter of the roof/wall seams. I will come back behind it with Eternabond sealant caulk later in May when I uncover it for summer service.
I also replaced the bat wing with a King and put Eternabond around it. Then I put Eternabond around the refer vent. When I replace the bath fan and shower dome/skylight, I will Eternabond them, too. That will be round 5 and hopefully the end of the project.