About this 3D model

March 17, 2020: Ref also to newer models; https://www.thingiverse.com/thing:4190818 https://www.thingiverse.com/thing:4227204 For enhanced versions, still under test, look at my " HO container 2020" https://www.thingiverse.com/thing:4190818 =========================================================== This is a tough model I am still working on. V2 is the first version V3 is a more 'robust' one