I think it's a crappy design. I had issues with it from day one.I had to take it apart and grease up the main bolt on the bottom because it was binding. Eventually, the removable bolts (where the red hook grabs onto) dug into their own track. Ended up getting this and have it for a year. zero issues.
my experience:
Both handbrake had issues with sensor / magnet. had to move them on both handbrake because even calibration didn't help. 1st one was also binding but 2nd one has larger footprint. 1st one had worse placing / positioning of the arduino bord and eventually the usb plug broke off :(
2nd one is made better.