I notice from a lot of build pics folks, like me, are waiting until later to install the air vents.
When you finally get to this point you'll have a hard time finding a good way to hold the vents in place and apply pressure while the adhesive cures.
Here is our solution, drill a tiny hole followed up with a dab of fiberglass "next time you mix some up".
Note: Two wood blocks, one on each side. 3 inch screws, be sure to use washers.
This made the install a breeze: