If you want to start separating them, then github would be the bets bet actually. Just start a project for induction and fork for brushless.
Github would also help as far as other people making changes--they can check out/fork the repo and if they have any changes they want to submit they can do so with whatever review process you want in place.
If you have any other revision control you'd refer I'm down to help, you're saving me a few years worth of design/testing.
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