nothing constructive to add other than: be careful! Changing out and messing with those springs can be dangerous. I had an incident changing out a broken spring on my garage a few years back. Door was open which is necessary when working on the springs so they are not tensioned...dumbass me didn't prop the door open with a rod or similar tool. The single spring (that I wasn't messing with) was not strong enough to hold door open, and the door came crashing down with me up on a ladder while trying to attach the cable to the pulley. Ended up with my hand trapped in the pulley
Luckily was just a flesh wound but could have been much worse.
Hopefully my dumbass move and near miss experience can save someone else from injury
