Ian, by the time I got to the last one they were perfect. I planed the material the best I could. I then numbered each piece with a down arrow. 1,2,3, and 4. 1 was left side. 4 was front. I then used each piece to layout thicknesses as they would lay when together. Then I used 1/2" marks always starting from the bottom. Then I marked the fingers and I X’ed the waste. I went to the bandsaw and I whistled while I cut the finger lines first, always cutting on the side to the waste. I kerfed each waste area. I then went to the bench and used a 1/2" chisel to remove the waste in one precise blow. Then I always held the chisel carefully and took a very very thin shaving to remove any lines from the kerfs. All-in-all, I was quite pleased with this process.
David L. Whitehurst