I appreciate that you didn't think I was just dismissing your input. My background in being a mechanic didn't really prepare me for some of the finer points of building geared components from scratch.

I know Marv has talked about the finer points of gears but I know from past experience if I don't have a direct hands on application of the theory it will not stick to my Teflon brain. So I didn't delve into it. I do a lot better at modding an existing machine or components. I was just looking through some of the Amazon and eBay gears and it was clear I didn't understand all the parameters. But as I was writing this I remembered a little program I picked up somewhere called Gearotic 2.0. So I quickly laid out two spur gears the same size and it's pretty quick and easy to just punch in how many teeth on the gears and see what the center distance is. And a 10 tooth gear would get me 1.968" center distance. Wonder why I didn't think of it before?