[Chris is me]

Originally Posted by KohKohPuffs

I kinda realized that this is a bit dumb; if you're going to make your own gearbox, then by that same process you might as well custom machine a gear to have the dog profile (unless somehow it's preferred to minimize machining time as much as possible)

It's way easier to machine gearbox sideplates or gearbox shafts than it is to index and machine even a COTS gear with non-revolved features like dog teeth. They're both certainly possible, but it's just more effort to get the machining on the gear concentric than it is to mill out a gearbox plate from stock. I'd probably do something like this if I wanted to use a different dog gear; it's a good solution I think. I don't see why this wouldn't work.