Stop spending money on the proprietary Wigo 410mm Blades @ $110 each and upgrade to a new Shelix 3.5"CC 16.125"CL 24.215"OAL SHELIX jointer head.Jointer/Planer. Have you considered the costs of the Wigo Tungsten Carbide Blade?  Try $435 a knife.   It's something to consider.  Not to mention the uncertain future of Knapp and its US distributor or lack there of-