This is pretty simple, I needed a trolley to be able to get some tools out and move them around but I also had this spare IKEA pegboard. A couple of iterations of 3D printed mounts I have combined the two like an IKEA Voltron if IKEA was just a body and one leg.

Always room for improvement but the IKEA pegboard has slots more than holes so you have some room to move it a little. I used some 20mm M5 screws and have adjusted from my original design to give a little more room to tighten the nut + add the washer on the back. Im using 2 flat pieces and 2 top mounts but you can always add a couple more wherever you have your shelf for more support to spread the load if you are concerned about how much weight is on your pegboard (also if you noticed it bending at the top).

You probably need supports for the reworked top mount but I did run the test simulations in Fusion360 this time to improve it a little.

Print instructions

I had to make some changes in the final published model that I did a hack on what I printed but now it will need supports as you wont be able to print the top mount flat on it's face anymore

---

Minor Update

How long do these last? After 5 years the top one on the side with the most weight using the non-reworked top mount broke today. So I'm reprinting it now in some PLA+ on a strength setting. That isn't too bad, good thing I uploaded the files here so I could find them again