Sorry to keep floggin’ this horse, Bruce… All is now installed. In the end, I needed to grind away most of the 1/4″ of extra bearing (lower bearing) since I could not properly seat the rudder post up into position to allow the retaining bolt to slide through the rudder head holding it all together. It is a fairly snug fit, but I’m thinking it may eventually wear itself down and loosen up as it ages. The first sail will tell the whole story, but I do have one question… I forgot about the two plastic rings that were up top (between the rudder head and the deck), but I think squeezing those in now, might be kinda tough. Are they absolutely necessary?