The lower bracket takes almost all of the load, so I decided to use two gudgeons. Since I didn't need the upper one in it's original position, I just moved it down the transom. The whole assembly is a bit lower than the factory location, which reduces the lever arm on the lower bracket while still remaining out of the water.

The key design element of the lower bracket is the clamp that pushes the rudder forward. The leading edge rests in a hefty block of HDPE. There is a pivoting piece of HDPE at the aft of the rudder which is pulled forward by the 2:1 purchase on the locking line. The side HDPE blocks are fixed and simply serve as guides.