Good plan Greg
Holee crap that's a lot of pump drivers
If you don't mind a suggestion for aesthetics, you could put mesh on the fans side of the door, between the fans and the door. Bug screen or something, and no screws on the outside
I know you've already drilled the holes, but you could still fill them in, or just rotate them and drill again ...
Unless you like the fan guards on the outside
I used black fibreglass bug screen for mine