Step 1: First things first
Being a wood worker, I chose wood.
Because the knife is so heavy, I decided against plywood or particle board and settled on dimensional lumber.
Again there were MANY choices, Pine, Maple, Oak, etc. Because I love the smell of Cedar when you cut or sand it and how a single piece of wood can go from chocolate brown to red to almost white in color within a few inches, I decided on Cedar.
One thing I didn't like about dimensional Cedar is its cost. At the time over $2 a board foot however there was an alternative. For less than $.50 a board foot I got Cedar fencing and from the wood I looked at, the fencing had better color and the grain pattern was more interesting.
Because Cedar fencing is thinner than dimensional Cedar, I glued two pieces of fencing face to face for thickness.