Prototyping is the path from idea to metal (or plastic) without paying for tooling twice.
A common sequence: FDM print for fit and look, tweak the CAD, then waterjet or mill the production material. Jigs, drill guides, and one-off brackets often start as prints in the shop.
Send what you have, even a sketch and a photo, and we will say what the next step is.
See 3D printing or send a drawing.



