try this!
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I found that the fans are really only effective if they have a source for the cooler air, which explains why it's mounted on the frown-vents.
I also used tiny aluminum grommets (from a craft supply store) as "feet" for the fans.
If I had a 2nd set of fans like you do, (and if I were really brave/meticulous) I would cut out the decal vents at the rear of the dome and mount fans inside of them to blow out all the hot air (hot air rises, might as well help it get out!)