Annealing machine?

Anyone here ever build a brass annealing machine? I am thinking about building something like this.

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I am thinking of using an old windshield wiper motor and a cab light dimmer switch to control the speed. The only concern I have is getting the saw tooth plate has I dont have a mill to make one

What do you all think ? Do you have any advise of ideas or pictures of ones you have made?

Thanks

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