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Last night in an idle moment I was messing about on a spreadsheet (mainly because I knew how much it would annoy Marv) to produce tables that, for a given gear ratio and number of division holes, would give the angular results for all combinations of turns and number of holes. The sheet has columns for each ring of holes, and the next step is to add a "search box" so that the nearest few combinations for any desired angle are highlighted.
OK guys.......Don't make me flick the switch on this thread as well.....OK?