I was really worried about gunk collecting at the bottom of an organizer, which is why most of the designs available didn't cut it for me (some had drainage, but were too small/large too).
It's better to print it on it's side. I used a bit of supports for the holes but that shouldn't be necessary if you're willing to file off some drooped filament in a couple of places.
The author marked this model as their own original creation.