About this 3D model

I scaled up the original about 50% and added holes for three 8x3mm magnets. Print the base in black and change to white filament at Layer 34. I recommend enabling ironing for all top surfaces. The red dot needs a dab of glue to hold in place, but the magnets are press fitted. I flipped mine upside down when gluing so the rough surface from the textured plate showed.