6-Speed and Reverse Gearbox

My attempt at a better gearbox than the Andreas Konkoly 9-speed and reverse gearbox.

The gear ratios are more useful at 12:1, 6:1, 4:1, 3:1, 2:1 and 1:1 in forwards and 12:1, 6:1 and 3:1 in reverse.

It also runs fairly freely.

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