I received this desk from a friend, who complained that only one leg would move when adjusting the height.

One look underneath, and i saw it was missing the rod from the left (powered leg) to the right (unpowered).

I used ½ PVC, cut to the lengths that i needed (leaving a few inches of gap for the tension adjustment tube to do it's part), the 3 parts i printed and some screws laying around (you know the little bin we all have… just look in there, and you'll find 8 screws that'll do the job).

the hole in the center of the linkage hex i ran a screw through to ensure strength.