That's good progress Beammeup, but does the throttle close against the idle speed adjusting screw when you set the speed control to minimum, with the engine not running?
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The diagram shows the idle screw, with a red oval around it, and the stop it should be against, with a purple circle around it. The throttle is shown wide open, as it should be with the speed control set for maximum. When you move the handlebar lever to minimum, the idle adjust screw must move from where it is shown in the diagram, all the way to press against the stop. If it doesn't press against the stop, please say so and we can talk about how to fix it.