About this 3D model

[Update] Please refer to the revised version as per the follwoing link: https://www.myminifactory.com/object/3d-print-bookshelf-corner-ver2-128039 My first 3D printed item which is not a toy ... a bookshelf is made for my baby girl. This print fit for plywood with the thickness of 5mm. No glue, no screws, no nails are needed at all. Simple and easy to install.