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So Burton has a diy snowskate/powsurf that you can buy and shape yourself. It already has a rocker profile built in. What if a ski company pressed some rectangular planks with a relatively generic rocker profile so you could DIY them? You'd have to stack them when you cut and make sure both sidecuts are the same but otherwise it should be pretty cool if you can make a ski of a shape you want without needing your own factory.
(mods move this to gear talk if that's where it needs to go)