The bow piece is simple and as you can tell the spi pole will go though it. Might not be class legal because my forestay attachement will stay above the ring and if you project it forward , it will actually meet the deck level forward of bow.
Oh well ! Until another i550 gets build to race me down here, that is what I will have on my boat.
The rudder plate is very straight forward but very cool. The rudder will be pined down by a long rod inserted through the 2 transom and 2 rudder heavy duty gudgeons. The pin is then pushed down, compressing a spring, and hold underneath a hook which is itself welded to the plate.
Should hold well any force applied on the rudder itself. I would be very surprise if those fail before the rudder do.
Shine on....