Once I had the fastener situation sorted out, I started the installation by ripping the fiberglass layup for the bomb bay doors into 4 equal strips. After they were cut, 1/4 square spruce was added along the hinge lines. One exception, though: By design (meaning the way the hinges are postioned) the spruce stringer that supports the hinge at the fuse needed to be a 1/4 triangle spruce stock. I could not find this material locally so I made a jig to hold the 1/4 square spruce in such a way that I could use a razor plane to turn the square stock into triangle stock. The jig was just two lengths of 1/4 basla triangle stock glued to my work surface. I thought I had a picture but I can't find it now.

Once the spruce was in place, the hinges themselves were attached along the lengths of the bay doors, ending up with the two halves ready for fitting to the fuse.