I plan on sand blasting the inside tommorrow and see to what extent the rust runs along the drip rail,so far I think it is isolated only on the passenger side for a few inches and only on the roof skin. My main concern is being able to cut out the metal inside the drip rail and not cutting into the drip rail itself, cutting above the drip rail is no problem,it's such a small area that I wouldn't consider another roof skin and I wouldn't just fill it with bondo, this truck is going to spend the rest of it's life with me or the other way round grin
John