Laser Cutter Build Night: Functional Limit Switches

It's pretty late, so this post will be short.  However, I have successfully wired up and coded the limit switches into my test program!  I wired and coded them as per this amazing guide.  I didn't even have to use external resistors!  Everything went fine and I now have code that runs parallel to the main body of code to detect button press events.
Additionally, I moved the breadboarded laser driver circuit to the 12V power supply that powers the fan and motors.  Now I don't need to use my lab power supply for that job.
Next, I will play around more with code and get the real burning laser running!