I'm working on assembling my "nearly insane" blocks. I'm going with a scrappy red for the corners.
The blocks without sashing are 6", and all of them have more than 24 pieces. The one with the most has 208. I've included a picture of the center of one of the blocks, showing how tiny it is. Easy to see why it's called "nearly insane"! The book comes with scale drawings, and the maker has to figure out cutting and assembly methods.