Customizable Modular Hook System

The inspiration for this project was the lack of organization I have in my closet and garage. So I designed a way to customize a hook system that can be scaled small enough for sets of car and house keys to large enough for brooms and rakes, etc. And since you can never have too many hooks, additional units can be printed and snapped together before screwing them to the wall.

Not only is this the first design I've ever done in OpenSCAD, it is the first design I've ever done for a 3D printer. And since I don't have a 3D printer of my own, I'd appreciate feedback from anyone who prints this design for themselves. I'm already working on version 2! :)