Hello, and thank you for your question! For your disc to be manufactured with precision, it is ideal to provide a precise CAD file (STP) along with a technical drawing detailing critical dimensions and tolerances. Here’s a helpful guide to properly prepare your technical drawing. If you have specific requirements for the finish, also remember to indicate the desired roughness, especially with a concave curvature like yours. This guide can help you better understand the impact of the surface. And it doesn’t matter if you’re an individual, as long as your request is well prepared, you’ll get a precise and tailored quote.