What should this version tell you?
A prototype is most useful when it has a clear purpose. It might help you judge the shape of a handle, discuss an enclosure layout or understand how two forms sit together. These are illustrative applications, not claims about completed customer projects.
Before ordering, name the question you want this version to answer. A model made to review appearance may need different choices from a part intended to explore an assembly. If a particular dimension is important, identify it explicitly instead of assuming every surface has equal priority.
Give the revision a clear identity
Keep the filename or revision reference consistent with your dimensions and notes. Explain what changed from an earlier version and what needs to remain the same. That makes the conversation about the next physical part more precise.
Think about the result you need
Layer direction, material and support contact can influence a printed form. FDM and resin are both available processes, with the actual material and finish options confirmed for the job. A visual prototype does not, by itself, validate the strength or long-term performance of a final product.
If the shape still needs work, start with CAD design help. If a printable model is ready, prepare its dimensions, quantity and intended use for a print enquiry.