Incredible multiple size marker holder

This is my first design - behold its majesty! What a masterpiece of plastic imagination, don't you agree? The simple yet elegant design was created with Tinkercad for 3 different sized markers.

This incredible thing has 8 holders at 16mm Ø, 3 holders at 12mm Ø, and one holder at 27mm Ø for a fat king size Sharpie. There's even a recessed area in the center for storing paperclips, rubber bands, bubble gum, anything you like! The possibilities are limitless! Well, limited by the size of the