About this 3D model

I designed this to fit my 40mm Fan and then thought it may be a good idea to have this work for any size of fan. You can use OpenSCAD to change the various options in order to create larger versions of this. The included stl is the one that I printed in Black PLA. I have attached 3 images of the printed part, 2 not attached to the fan and the other attached to the fan.