A lot of what breaks on a Lucas garage door is doable with basic tools, and a lot of it isn't. Lubricating rollers and hinges, tightening loose hardware, checking the photo-eye alignment - fine for a Saturday morning. A torsion spring under tension is not. Most houses here went up around 2002, which means the spring on that door has likely already outlived one duty cycle and is either original or a single replacement - and a spring that's been working 20-plus years without service doesn't give much warning before it lets go. If the door won't move, if a cable looks frayed, or if the opener is grinding instead of lifting, that's a call, not a project. We'll say plainly: replacing an opener's gears or rewinding a spring yourself is how emergency rooms get garage door stories. Everything else on the list above, go ahead.