Agreed. Mine eventually bowed up enough to contact the pinch seam and eventually the very front of the rocker panel. Now reinforced with a little more gap.
I would consider making some beefier gussets for the slider legs. TG's are known for being small and wimpy. My rig had TG sliders on it when I got it and I have round indentions in my pinch weld where the come up and hit.
Mine are not TG, but home made - design similar though.
I specifically mounted mine so that the inner long leg of the ladder was right under the pinch seam, that way when they flexed upward the weight was distributed all along the seam, acting liek a brace, instead of in just one place like it will if they stick out that far (creating GearHead11s problem)