I was reading a older post about the spiral Cutterhead for jointers.
I bought a Bird 6" about a year ago, and will never go back to a regular Cutterhead again. I use birds eye maple, and other figured woods allot, and have yet to have a tea rout. One asked if you might have to shim the bearing, to level it to the out feed table, i did only by 2 sheets of telephone book paper. Some of the better machines are adjustable side to side, but not mine. Even big ugly knots finish of beautifully, thanks to the carbide knifes. Another plus is that there are four sharp sides to each cutter, just rotate when they dull, nine has 52 in total I think. And trust me they are SHARP!!!!!! Use gloves when you install it. The whole conversion only took thirty minuets on a grizzly machine. Oh one more thing, you can face plane
6" wood with VERY little hold down pressure. For me the cost is well worth it.See Ya Lee Tollett