Hi John D!! Not a silly question at all! But, if the tool is made to the correct dimensions..the set screw kinda becomes redundant.... at least I have yet to see them on other tools! The best tools for the 1900 type .30 cal. have a notch machined in them, so that the sq. front sight block fits into, so that it can't go back and forth... lot'sa good ideas..making them affordable is the tough part... Best to you John D! til...lat'r...GT
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