A new type of planer blade?

http://nanaimo.en.craigslist.ca/tls/1230996353.html
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Rusty wrote:

I'd be more impressed with single-sided blades. Mbius strips here we come!
Chris
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Double sided straight blades, and spiral blade inserts with 4 sides, but triple sided? Maybe could be done with a shape based on an extruded triangle, but that's outside my ken.
Tom Veatch Wichita, KS USA
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