I'm thinking a DCS board in simplest form with basic reverse functions including speed control. If it's affordable maybe that's all some folks want to fix PS 1 or convert conventional's. Maybe these core functions can be enhanced with the really cool stuff at increased cost but affordable. If the boards are direct replacement or almost, there could be a savings on third party installation costs. I'm just blue skying: set a goal, understand the market, develop a conceptual design, formulate a business plan. See how close you get to the goal and still make money.
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