How to install an anti-sagging gate kit to keep a wooden gate on a fence from rubbing on ground. A simple tension line and turnbuckle between the corners lifts up the bottom corner of the door. My fence didn’t drag at first, but over the first few months the corner farthest from the hinge started to drag against the cement footing for one of the posts.

Update: I attempted to fix the gate warping with another turnbuckle kit and “True Latch” steel brace (spoiler: didn’t really work): https://www.youtube.com/watch?v=GDB_9Mg01qw