Here's a photo showing the approximate configuration of the rudder hardware. Checking my notes, it's all 3/8" bronze, which was sourced from ccfasteners.com for $125. The mahogany cost $140. Access holes for the internal nuts were filled with autobody filler after the rudder was mounted to the hull. Then everything covered with bottom paint.

One of the more challenging tasks was aligning holes at different angles through all three boards. It would be easier with a drill press large enough to accommodate all three boards AND a drill bit long enough to get through them.

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