If you haven't already got your wing fairings in place and permanent, I would offer a suggestion. I purchased at the LHS, some .30 delron (plastic) sheets to do the entrance cowl baffleing on my 260 and the tail wheel fairing on my Sukhoi. It is completely moldable with just a little heat from a heat gun. It conforms well and it is also paintable. Don't know if that helps you but just thought I would toss that out there for you.
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Cool...Hope it works out for you. Looking forward to hearing/seeing your results.Thanks Much!!!
Looks like a much better alternative than the roof flashing. I will definitely give it a try.