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 confirm both tracks are parallel and with the same peak. Measure diagonally between opposite track corners to confirm they’re sq. with one https://docs.google.com/spreadsheets/d/1QCN1WLbKGS3vi-Xae0dxBtfgpFnWP7MNWfQLvJzVd6w