Bill, great thread and what will become an even better airplane.
What are you going to do about hardware? Things like lock nuts; steel, nylon, NASA, or castle nuts with a pin? Stainless or Cad-plated screws? Nylon or metal washers?
Leo Loudenslager was fanatic about cutting as much weight as possible out of his Lazar and the Shark. When rebuilding the Lazer, he would assemble a part, then hacksaw all but one thread off the end of a bolt or screw. He kept every little piece he cut off in a 5 gallon bucket that probably weighed 15 pounds by the time he was done. Ounces lead to pounds.