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  1. Measure the width of the two rods
  2. the center of the holes in the fan are about 104.5mm apart. So mock up that in something like blender, then take the thing, line it up to the 104.5mm things with the part that hooks into the fan.
  3. modify the model to where the clip that hooks onto the bars go out that far(easy math req, something like distanceBetweenRods - 104.5/2, or something).
  4. there is no step 4.