Here ya go. That's a Merc 500 on it. If it were me, I'd shift to 2x6's for anything bigger. I also like the 2x12 (solid) as opposed to my original drawing w/3 2x4's. And after it has been done, I'm thinking of reinforcing it right where the 48-deg mark is. I only have some drywall screws there now, I'd like to lag in something a bit heavier.
Don't trust all of the angles, they should work but something was a bit off. I just forced a few things together to get the 5" setback I was looking for, so the OB sits nice & straight (enough). And obviously, check the measurments to make sure yours will fit before cutting.
