I conjured up the idea of a fully customizable box joint and finger joint jig that allows for any width fingers but that is still super simple to assemble and operate. I think I may have just done it! The idea is so simple that I'm sure I'm not the first person to come up with this design, however I haven't seen anything quite like it online. If you'd like to try making this jig for yourself, you're welcome to the plans I drew up. As a thanks, please consider sharing the video and becoming a subscriber! The larger the audience, the more fun we can have!