Ultimate gearbox variable gearing

This gearbox is quite customizable, but will require some effort from you. It is designed to have a transfer of motion with 5 gears meaning 4 different ratios. You select which ratios you want and then create the gears based on your needs. I have included the following gear ratios, 1:1, 1:2, 1:2.5, 1:3, & 1:4

The gears are based on a common axle to axle distance of 25mm. That means that the pairs of gears are matched so they can stack. Just because a gear has 8 teeth doesn't mean it is i