Cutting Board Stand - 2 sizes

Hi, I designed a heavy duty cutting board stand. Can also be used as a laptop stand. Fits boards upto 26mm thick ~ 1 inch. The standard size holds boards upto 250mm tall while the large one I've tested upto 320mm tall. The rods can be custome sized. They do friction fit but I prefer using super glue. I'm a novice designer and new to 3D printing and designing so any recommendations or suggestions are welcome.