Hi there, My name is Abu Shahama. I’ve read your brief and can see that you’d like to design wallet for US coins and need STL file compatible for 3D printing. My team has 6 years experience in product designing and manufacturing engineering. We provide our services in 3D Solid & Surface Modeling, 3D Printing, Assembly Design, Mold Design, Sheet metal design, Tool design, Reverse Engineering, Detailed design, Manufacturing drawing and many domains work. I would approach your project by starting with concept design and getting the design completed, before starting the actual development phase. I am highly qualified for this project and would love to speak with you further about taking this project on. If you'd like to view my previous work, take a look at my Freelancer Portfolio.