Custom parts
A prototype should answer a specific question: shape, fit, strength, wear, or production feasibility.
Match the prototype to the question
A printed model can be excellent for checking space and ergonomics. A machined prototype is often more useful when testing a metal fit, threaded interface, or solid-stock behavior. Neither route automatically proves every aspect of the final design.
Keep the functional details
Maintain the features that control the test: locating surfaces, fastener seats, fits, and load-bearing sections. Cosmetic features may be simplified when they do not affect the objective. Record those simplifications so the prototype is not mistaken for a fully qualified production revision.
Make the test repeatable
Identify the model revision, material, and relevant dimensions. Measure the interfaces that matter before assembly and record what changes afterward. A prototype that works once under light loading is not a complete durability test.
Feed the result into the next revision
Revise the model and drawing together. Confirm fit and function before increasing batch size. KRC’s CNC quote supports quantities starting at one for compatible designs; custom RFQ covers requirements outside the standard online scope.