Many thanks to all the members of Classic Glory who helped me along the way. I wouldn't have been able to do this without support.
There was some question whether I had the right Amal carburettor. I confirmed all the parts measured the right specs according to everyone's input. The only thing I hadn't done was to remove the jet block from the carb body. All the self-help information said NOT to do this. Well, I couldn't very well make it any worse could I? So I heated up the carb body and used some wooden blocks to dislodge and knock the jet block from the carb body. I found some considerable filth lurking in there. Certainly a few of the passageways were blocked. I scrubbed it clean with a toothbrush and some parts cleaner. Then followed up with carb cleaner and compressed air. Don't worry about the dremel... I wasn't using that on the carb. The former owner must have soldered the pieces of wire to the adjuster screws. That's a pain in the neck when all the surrounding parts are HOT and you can't use a screwdriver.
No one was around to capture my victory lap on video, so this photo at the neighbor's house will have to do.