A major part of the art of rebuilding is to use a rubber tipped air nozzle and plug it against all holes encountered then press the button. I can't possibly remember the number of times a tiny passage withstood 100 psi for a few moments then went ptui...hiss.
California does not top my list of states with a history of intelligent legislators or legislation with things that are the product of engineering. But that's no reason to stop a carb rebuild. Replacement of a viton needle and seat is vital. New Gaskets can be cut with a little patience and an exacto knife
Yeah mine the bauxite. Electrolysize the aluminum. Cast it in furnaces. Electricity - burn coal - petroleum for transportation. To a nitwit legislatot that is "greener" than a few cents worth of gasket paper, brass, and viton. Don't smirk - you elected them...