IIRC Steve Knight of Knight Tool Works just installed a helical on his
jointer. Do a google search on his name and it should come up. This was a
recent thread within the last month. I think he went with a different
vendor.

two different heads. but it looks like a cost effective way to go over regular
knives. I have a Helical Cutterhead that is far more expensive. nicer too but 3
times the cost.

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Knight-Toolworks & Custom Planes
Custom made wooden planes at reasonable prices
See http://www.knight-toolworks.com For prices and ordering instructions.