For Fuzz Friday, here's a layout for the Fat Fuzz Factory in a 1590B in a more traditional orientation. All pots are board mounted as well as the Fat Switch. For C1 and C2 you'll probably want to experiment with values. Using an on/off/on switch gives you an extra option over the original. 3.3uF is a good place to start with one of them. Just a note, whatever value you chose will be in parallel with the existing 100nF cap. Thanks to p0mp0 for sending in his layout.