I spent several hours in the shop yesterday trying to make a dowel making jig similar to the one Mathias Wandell
and Izzy Swan had on their sites. I could never get them to work just right and spent way more time tweaking the setup or sharpening the cutting blades than making any dowels. I ended up making one that mounts on the table saw and is really simple to make and use. This particular design skips a step they did where the corners of the square stock was either rounded over or cut off with 45 degree cuts on the table saw.