So, David, did the new cutter head give a better cut? I've been thinking about getting one for my old Porter 12 inch jointer, but they're pretty pricy, and I haven't found anything with just the right shaft diameter and length. I'll probably have to do lathe work and may be change the bearings. I had converted this machine from babbet bearings to high speed ball bearings with oil lubrication several years ago. I'd consider changing to the insert head just because I don't like sending the blades out for sharpening, waiting, paying, and finally a half day of re setting the blades.