This is an update to my original plastic construction Speed Champions wall mount: https://makerworld.com/en/models/565201. I designed this basic mount that is nearly invisible once the model is mounted. It uses 2 small screws to mount to the wall and is solid once mounted.
This version should work with many more models including those models that have flat undersides. The original model did not work with these models.
I've included the OpenSCAD files as well with this model. I do use the LEGOs Scad project to generate the holder https://github.com/cfinke/L_EGO.scad (remove the _ from the link).
Design by SpruceWayne on MakerWorld (license: BY).
