Puzzle Box Shelf for Large Command Strips

This is an extremely basic shelf I modeled to hold 2.5” puzzle boxes on a wall using the large-sized Command Strips. Since I only had large Command Strips available, I made the supports match the height. It is meant to fit 2.5 inch puzzle boxes, so that’s why the supports are taller than the shelf part. I made a basic arc cut out just to get used to Shapr3D during a trial period. I will make additional sizes to fit other Command Strips and other sized puzzle boxes, and I may improve the design along the way. I’ve already thought about fitting them in a slide rail of some kind so the height can be adjusted to accommodate differently sized puzzle boxes.This is my first 3D-printed design model ever, so go easy on me! I already see some areas to improve upon this but any advice is accepted!