Do NOT switch a t-bar from one side to the other. Once a t-bar has been torque'd in one direction, if you reverse that direction, it WILL fail.

My question is, has it sagged so much that you can no longer crank it again?? All t-bars will sag a little over time, so you crank it, and be done with it. Unless it's dead, it should be able to be cranked again. Yeah, you'll most likely have to reindex it, to allow for more cranking, but that's not a problem, either.