Hi, I am an user that have experience in 3D modelling. I was stumbled in this website by the coincidence and hopefully here will be a good platform to hone my designing and 3D modelling skills. For now I need to ask some questions: 1) How do I upload the items with 2 or more parts that need to be assembly? 2) I have certain oil & gas structure such as oil rig jacket, FPSO modules and Subsea Manifold model that I have modelled myself from the my previous job. If I want to sell this model in miniature form, will there be any legal issues from this?