In cruising through the latest Griz catalog, I note that many of their jointers now have the spiral cutterhead option (even on a 6" version!). Anybody out there have a jointer with one of these heads on it? I could see where it would be really advantageous, particularly on figured woods. At the same time, it's an expen$ive option and I can't help but wonder if it's worth it. Granted, you have four cutting surfaces on each little cutter, though I would think you'd have to rotate the whole lot of them to gain any benefit. Also, I imagine that the manufacturing process *has* to be real, real tight, particularly with how the cutterhead sits in the bearing pillows. Don't think there'd be *any* room for error, and I don't know how/if it's adjustable. Thoughts, opinions, suggestions?