About this 3D model
I loved this design from Thingiverse for my other printer, so I remixed it to fit the Prusa MK3S+. IMPORTANT NOTES: The screw holes aren't exact, and I don't have time to fix them since I already printed mine, so I just drilled out the holes a bit till they were right. If you don't use a sunk head screw for the FRONT screw, your print head WILL hit the screw… so either use a sunk head one, or leave the front screw off - the unit still sits nicely. Make sure your zip-ties are not at the far right of the print head cable, or they'll hit this thing. I printed in 2-tone PETG. I'll share the files. I suggest 3 perimeters, but only 5-10% infill. No need for strength here.