Allow me to preface this question with a short bio. I am a nerd and I do weird stuff. I embarked on designing and building my own CNC router from scratch a few years ago. Since then, I have had many distractions and setbacks that have delayed the completion of this project. The good news is that it is almost complete, needing mechanical adjustments and some wiring. My question to this group is, "should I have two limit switches per axis (on both extremes), or just one?"