Both. Mostly paper and pencil though. I don't particularly care for CAD. It was kinda fun though. I used one at a friends home to generate the sprockets. I don't recall what the program was.
Gears will be cut soon. To keep it simple the bevel gears will have 20 teeth. This makes it a job using the Dividing Head. You can use any index circle and two full turns. Dividing Heads have a 40:1 ratio. I also have an involute cutter, a B&S #6, 20 DP, 17 - 20 teeth.
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