devils advocate here....why not slap up the siding end to end the rest of the way, come back in and measure and cut out for the attic vent? the trim around the vent would hide any ugly cuts. some super stretch caulk around the vent would seal the deal.
i know i know, the lazy way aint yer way.....but i'm just sayin
The lazy way IS my way, but it's gotta yield the correct result. Because the siding butts up against any frame and the juncture is caulked, I have to install a frame made of the same prefinished trim that I used to surround all the windows. This can be done after I adjust the framing from the inside (forgot to anticipate this need during framing, but will be no biggie, particularly since I get to work from the inside for once....but it will be hot up there). Once the hole is framed from the inside, I head back out to cut it open. Anyway, I envision another appearance by the scaffold, similar to this event.
I can pre-assemble the exterior frame, hit the scaffold, cut out the sheathing like a small window, and nail on the picture frame. While the scaffold is up, it should help logistics as I wrestle with the last few pieces of siding. (alright, well at least it sounds like I know what I'm doin')
