I wanted to put wheels on my 45L SAMLA, and after trying different wheel and base plate options from others, none fit perfectly. I also had 4 wheels from an IKEA VARDÖ unit, so I made these base plates which fit neatly into the corner leg spaces of this variant and the holes are exactly 31.8mm apart to fit the VARDÖ wheels. The base plates are a few mm thicker than the SAMLA corner walls in order to be able to fit a 9mm long screw. You need to print 2x non mirrored and 2x mirrored plates for a SAMLA box.

I also uploaded a blank plate for others to add holes with different parameters (don't forget mirroring after you added the holes!). I don't suggest printing the blank plate and then screwing into it because the infill might not hold the screws correctly.

Otherwise you can print with default settings like 0.2mm layer height, 15% infill, no brim. I printed with PETG but it should work with PLA as well.