Do you want a wall mounted hook system that can be easily changed and modified? 

A simple, sleek design that utilizes a twist hook system by aiannazzone to make any version of a wall hook system you need with no visible hardware!

The accordion style is primarily an appealing design but this method helps to locate many fixtures on a wall in a known location. Up, down, left, right the choice is yours, with as many pieces as you desire. Simply print and mount more slats for a bigger footprint.

The large slat is 380mm L x 40mm W x 4mm H

The small slat is 220mm L x 24mm W x 4mm H

Both use 1.4mm pins above the 4mm height to help location but can be removed with a drill if your printer's settings aren't perfect or simply removed in your slicer.

The smaller version is designed for most printers with a twist lock system of 50% the original size however for my 400mm printer I opted for the larger version with a 1:1 twist lock design.
 

I've included 5 simple designs to get you started.

A simple cover Cap

Standard rounded hook

Thick rounded hook

Thich rounded hook with a straight cut

Angled straight hook

For the smaller version there is just a simple round peg but all the larger designs can be used just remember to scale it 50%.

Otherwise it's simple printing techniques needing no support. Some hooks may need some support depending on orientation. I printed with the connection receiver up for a good top surface but meant some hooks needed support. 

Just like aiannazzone I've included the STEP files to help makers out there adapt it for your own needs but if you have any amendments or comments please leave them below.