"Re-invent the wheel" means there is already a wheel. Like already a knife that works. Bill was just kidding you anyway. and providing a alternate cutter for those who don't want to mess up a good putty knife. Both ideas are worth mentioning and any other ideas some folks may have. If construction guys use it, it is the best tool for the job. Can't see blades getting dull too fast cutting foam? Olfa sold "down here" by Home Depot, Sears, Grainger, Amazon, Ebay.....


Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn