Yeah, I'm thinking it also must be one of those things you just have to see. I figured I'd be able to understand it anyway when I got to it, but at this point a regular framer will be doing it, it seems, so it doesn't really matter I guess.
I just built this type of roof last summer/fall/winter. I did bevel the edge of the vb to give the sheathing something solid and flat to nail into. All the angles took a little while to figure out.
The ridge did not fall on a main-roof rafter. To carry the ridge on the main roof, I put a small header on the inside of the main roof between between the rafters.
The straws sticking up will show me where it's safe to cut holes for venting.