Garage Door Service Salt Lake UT A-1 Garage Door Repair 930 N Main St, Tooele, UT 84074 (435) 579-2944 https://a1garagedoorrepairutah.com/ Make use of a string line to verify both tracks are parallel and in the same height. Measure diagonally between opposite track corners to verify they’re sq. with one https://fellowfavorite.com/story21296647/the-ultimate-guide-to-ideal-door-garage-door-installation