Clamped and drilled forward skin to firewall. Also drilled center brace and tip up braces to the skin. I really had to cinch down the skin with straps to get the pre punched holes to line up with the underlying ribs. Even so, some of the holes don't line up, and I don't think it's possible they will no matter what. The distance between the holes in the skin and the holes in the underlying bulkheads are way off.
