This is a very handy tool for bookbinding. It makes punching holes in your sections a lot easier. The 45 degree recess was made by a local carpenter using his rotating circular saw. (It took 3 minutes!) The top part was destroyed in the process, so I made that part out of cardboard. Different versions allow for variation.
Feel free to use this as a guide to create your own!
The channel at the bottom of the V-groove provides for positive penetration of the awl when punching, and allows one base to be used for many different hole spacings. Also a very elegant solution for the hole spacing jig. I like that you have several and each can do one or more spacing configurations. When Spring comes I'll have to break out the table saw and make one