.stl/.model conversion problem with CATIA V5

Hi friend its me again, I think you can create a copy of this model, as the same I made it, please check the picture that I attach you, and in a catproduct assembly the model and add a new part and change the name with your name for example, and try to start to project lines with the edges, and if you have questions, just let me know, you can use surfaces or solid module.

Best Regards,