Not as easy at it looks

Tim runs into more trouble with the chessboard project:

I finished the glue up of the 8 strips. Then went to cut them to 2 inches plus about one-eighth, so that I could stack plane them to exactly 2 inches all as 1 operation (precision). Well, my temporary roommate was looking over my shoulder, stuck his nose in, made some comments. To get him to shut up I made a modification to the setup and mis-measured. Then I started cutting strips. After 4 (of 8) it was clear that I would run out of material. The strips were too wide. Got mad, screwed up one, and was left with 6 good ones. Now I have to mill all new pieces from rough stock to make up the difference.

See also "How to build a chessboard".