I haven't yet, but my neighborhood mechanic did. I will do the same as he did. He mounted eyebolts in a 2x8 that he mounted across multiple rafters on both sides of the lift. Then he made turn-buckles (kind of like tie-rod assemblies) that he ran from the top cross rail of the lift to the eyebolts in the rafters (both directions). Then he could tighten the turnbuckles on each side until they had equal pressure and held the hoist from moving back and forth.
