Magnetic whiteboard marker holder expo

I wanted an expo marker holder for my whiteboard at work and had a 4 pack of markers that I had gotten on Uline. I wanted it to be magnetic, so I did not need to permanently attach it and could move it around if I wanted to. I used some 1/2x1/8" (12x3mm) neodymium magnets that I purchased on Amazon and attached them with CA glue. I designed this part in inches, so if it shows up tiny in your slicing software, multiply the scale by 25.4 to convert mm to inches. Let me know what you think and post those makes!