Whiteboard pen + eraser holder. Wall mount

I include 3 models here.  Goal is clean, minimal and won't trap dust.

I first tried the larger model I provide here with strong magnets on the back to stick to my (metal backed) whiteboard, but the magnets would not hold.  The metal is just too thin.  I opted to mount to the wall with VHB tape, but I needed to break the design into 2 narrower models as pictured.

I provide all models.  I imagine most people interested in this design would want the single model which holds pens and an eraser together.

The hole for the eraser measures 3"x1.5" (76mm x 38mm).  Pen holes are 11mm which are just large enough for the narrow expo markers pictured.  You may have to file them down a little if your printer isn't tuned well for bridging, but you want a snug fit so the pens stay upright.

STEP and Fusion360 files included so you can customize.  No supports are needed.  Print on the side.