So when testing the rope stopper (the rectangle with the springs), the handle slammed into it, triggered the main switch, and pulled itself apart. I went home and printed stronger and bulkier parts, and add a pulley to the stopper to pull the main switch if and when the handle makes it all the way back to the puller. (I'm hoping that the user lets go far enough away that the handle doesn't reach the puller, but in case it does, this is a safety feature). I also added a rope guide next to the spool to keep the rope from coming off when not under tension anymore. I'm still thinking of a way to mechanically trigger the low/high speed switch, so I don't know about that just yet.