Finally got the Byrd Shelix Journal Head installed on my planer. Ordered it through Holbren, Sawmill Creek members get 10% off, SMC10 is the code. First off, I installed the head by myself and it was completely painless, I was shocked to say the least. I will say that I am thrilled that I had Byrd install new bearings for me and I would suggest if you are thinking of upgrading that you do the same thing. I also ordered a new gasket for the gear box while I was at it, I would recommend this too since you may have to pry your gearbox apart like I did. From complete teardown to running again, I would say 3 hours and I was in no rush by any means. Cut quality? Great! Sound? Forget the ear piercing whine of straight knives, it's gone, you can even talk over it while it's running, the dust collector is louder. Under load, there is no change at all in the motor and I was surprised at that to say the least. I ran quilted Cherry, no tear out, flat sawn Cherry, no tear out against the grain and I even pushed it with curly Maple and no tear out. I am very happy with this upgrade and would highly recommend this to anyone looking into these heads. The folks at Holbren were awesome to work with. Hopefully this review helps and the instructions were detailed and with pictures, almost like a chilton manual.