I am the designer of the WIfi Pixel for Renard Plus (see: renard-shop.com/home/37-es-wifi-pixel-controller.html). I loved the original idea for the mount for my board, however, I wanted to clean up the design a bit. I redesigned it with rounded edges and added the Renard Plus name. This should work equally well to the original just maybe look a bit more polished.
I reworked this a bit to make room for the terminal blocks that are used on the board sometimes. I also changed the overhang so it would print cleaner and made the logo an "outie" rather than an "innie" (see pics). I prefer this in PETG (or ABS) rather than PLA as you want a little flex for board fit.
One last tweak 4/16/19- added a filet between the body and the mount tab for added strength.
Hope you enjoy.
.3 or .4 is fine, .1 will be smoother.
any PETG or ABS recommended but PLA will work (just more brittle)