The floor joists above the tank were positioned perfectly for my needs so I just hung the tracks right from them, then I replaced the little bolt fitting in the wheels with an eye bolt, but before I screwed it in, I cut some 1/8" aluminum bar stock to the length of the fixture then drilled it to line up with the eye bolts on the fixture to let the eye bolts pass through. This aluminum is to ensure the two carriers on each track for each fixture slide together instead of independently.
I hung the lights using S-Hooks and turnbuckles, this allows me to do fine adjustments if I need to.
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