3D Printed Sunglasses Storage

I have a problem - I buy many sunglasses. All cheap, all indispensable. They were becoming a huge pile and a huge annoyance. 

3D printer to the rescue.

I have a rack of shelves that has a side that is handy to access and not doing much that could be considered useful - why not attach some form of sunglass holder to the side?

I found that a good spacing was 75mm wide, 170mm height (roughly 3' x 6 1/2').

The Ikea shelves shown were perfect for my plan of a grid 5 sunglasses wide.

I did a few tests and came up with the attached design. It's a simple rounded hook that is offset from where it's attached. 

I've included models for the single hook as well as 8-pack of hooks so printing can be done quicker. I have an older 3D printer (thing-o-matic) and the heated bed is loosing adhesion - so I use "ears" on my prints. I attached version of the single and 8-pack that have ears. 

The Openscad source is also attached.

Map out the location for the hooks. Drill a single guide hole at each position on the grid. Using a 1/2' #10-12 screw, attach the hook through one of the eyelets (don't over tighten). Once firm, make sure the hook is nice and level and drill the second guide hole. Screw it!

So much neater.