Boxed opener installation complexity
That said, we get the DIY question a lot, because a boxed opener kit looks simple on the shelf. It isn't, once you're past the first bracket. Wiring in a dedicated circuit, setting travel limits on a door that's been rehung more than once, and getting the safety reversal sensors aimed correctly are the parts that trip people up, and a sensor that's out of alignment by even a little is a door that won't close - or worse, one that closes on something it shouldn't.
