It is more like a cable and an adjuster level. Have you tried releasing the lumber without sitting in the seat? This may help, also here is how the lumber works so you can see what's going on in the diagrams below. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
Images (Click to enlarge)
Monday, August 1st, 2022 AT 10:54 AM