About this 3D model

My son is a great NBA Basketball fan and when he can't go outside to play, pass a lot of time making dunks on some commercial mini hoops in his bedroom. Unfortunately all of them cannot stand a lot the continuous stress and break in a short time. The last one that has been destroyed by my son was a Mini B Playground Red set from Decathlon brand, only the ball has been saved from destruction. So I decided to make a printable 3d hoop designed to be compatible with the ball diameter and withstand the stresses using an hinge and a spring. At the end then, as a last chanche, owning the 3d models, allow me to print spare parts in case of breakage. The spring has an external diameter of 10mm a wire diameter of 2mm an is long about 30mm and the hinge pin is made with an M4 screw 70mm long