I was wodering how long it would take someone to ask that. I'll warn you now that I didn't make it using proper or safe woodworking techniques. First I made the bass block 15" x 2-3/4" x 1" and made sure it perfectly flat on the bottom. Next, I set up a fence perpendicular to the blade on my table saw so that the center of the blade hit the center of the block. I then proceded to slide the block sideways across the blade taking off about 1/64" per pass until I had radiused th whole bottom of the block. Obviously this method can only be used to make a radius block that matches the radius of the blade. This would be considered an extremely small radius by most people, but for a four string for someone that also plays upright, it feels fine to me. No-one who has played the bass so far has had any complaints about the small radius either.