I built this stool from an article in Fine Woodworking #69 as a shop stool to sit and noodle on things like fraction math, angles etc rather than sitting on plastic milk cartons etc! It is made from Yellow Birch lumber I picked up from a local guys a few months ago for a song. There was plenty of compound angles and tricks to making this stool so everything lined up and all the joints were tight. If I had to do it again, I would mark the curves on the legs prior to cutting the mortises as I realized after I cut them that once the curves were cut, they wouldnt be centered on the leg. This was a fun project to build with lots of curves and angles to ponder on.