Thanks, also there is some more information about the gearboxes in the technical binder linked in the original post. The reduction is 5.90:1. These were my first custom gearboxes made into real life so I’m relatively inexperienced compared to many others on CD, but I will say two things, firstly if your looking for a place to start there are bunch of good YT tutorials that break down step by step the CAD to Part process that would do a better job explaining then I would. Secondly, the complexity difference in designing a single stage vs a multistage or even a shifting gearbox is low. The hardest part(at least for us) is making sure to design and machine with proper tolerances. So when designing any type of custom gearbox just make sure to stay in close contact with your machinist.