My idea is to modify the electromagnetic breaks on roller coasters to work on cars and trucks. My question is this: how should I test the need for this product? I know that people will say an idea "is great" when you ask them, but when actual money is involved that's when people tell you what they really think. How can I test if there is a need/market for this product? The benefits of this product would include being more eco-friendly due to less brake dust, and they would last a lot longer due a lack of friction.
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