The rudder in the photo is mine. Some time ago USI offered it as a prototype. I believe it is an Antrim design. I sent my standard rudder to USI, they modified it by removing the gudgeons, filling the holes, and adding the pivot hole. It used a pin in front of the rudder to hold it up (as in the picture) or moved behind the rudder to hold it in the down position.
Since I got it, I have modified it to fit a bit better and added two lines one to raise it and the other to hold it in the down position. I am attaching pictures that I took of the modifications. It is much better to have the rudder out of the water for forward movement of the boat because if it is in the water, the tiller sweeps the deck when you turn. If it is out of the water, backing is also much easier.
I have used it as modified for probably 10 years and it has worked well in all types of conditions.
Allen,
U20 #7