Jon, you forgot one- - - -the early Quadrajets with the main jet passages at the bottom of the float chamber and soft plugs with the carburetor body material peened over the plugs. They were notorious for leaking the float bowl dry when the peening job wasn't done properly. The fix was a good cleanup job with a wire brush and a coat of very durable epoxy applied to the jet well area. I've done that to dozens, if not hundreds of Q-jets over the past 40 years!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!