Stock vespa variator mods

I know this has been gone over on here before, but I need some clarification.

Saving the bushing: by this do you mean the flange on the outer pulley half that extends around the shaft toward the frame or the fat brass guy that goes on the crank shaft? if its the latter how is it done without messing up the "keys" that keep the pulleys from just spinning. If it is the former how much do I take off? All of it?

Notched variator: I saw a thread on this for Hobbits. Is there an equivalent for vespas? Is the pulley big enough? or will it just spit the belt out if you allow the weights press up further? Thanks ya'll.

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