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I have a skewdriver, even made a special driver tip with a screw retainer on it...not worth the effort

The first gear tops were for an rc racecar model.  I had to turn down the screw to fit the gear.  The next ones I made a blank gear shape drilled to fit the stock screw.  Then I cut/filed teeth in it for the sharp stick.  They don't have to mesh with anything so they don't need to be uniform.  They are held on with a little set screw.