Vent cover for Zen float tent

>**Note: I've created an improved version of this, which you can find at https://www.thingiverse.com/thing:3085350**

This is a replacement vent cover for the vents on a zen float tent.

The inner fins on the zen's vent cover have a tendancy to break off, and are a bit annoying to insert into the vent.

This is a "drop in" replacement, with heftier fins that are tapered at the end, for ease of insertion.

Note: The fins are long enough that if you have one on the bottom and top of the vent, the fins can hit each other. So you have to rotate the vents so that the fins from the bottom and top mesh together.