Attention Stumper, you are right and I AM a douche! The 3 sided piece of metal IS a bed knife clamp. the anvil is nothing like a typical anvil. It is like a 16" long rod with 6 sides. Being borderline stupid, i overlooked it all along. It does appear to be a solid piece attached to the feed table, but if you chip the old sap and dust away, you can see that it is a removable part. I got a manual for the machine today and it speeled everything out for me with pictures, diagrams, and the recommended specs.