Transom framed, Doug Fir top and Redwood everywhere else, also reinforcement for the rudder hardware. I try not to second guess professionals, mainly given the fact I am not a professional boat designer like Michael Storer but this seems to be a common addition. As a backpacker "of yore" I know the saying can also apply to boatbuilding, "Grams add up to ounces, and ounces add up to pounds." Students of the GIS can probably deduce my rudder hardware choice just by looking at the picture; completely to spec, simple and lightweight. Ronstan rf254 & rf239 gudgeons and a 1/4" SS rod bent and drilled.
A part of the build I have very much been looking forward to, including some of my late Papaw's wood into the boat. Cutting 4/4 cherry for the tiller. Had to go through the joiner/ planer a few times.