Make one, then fix it

Your first version will be off somewhere. Order a single unit, test it, and adjust.

Resist the urge to order ten. A single unit exposes the mistakes that no review caught: a hole that is 0.3 mm off, a bracket that blocks a screw, a finish you dislike.

Log every problem against the parameter that caused it. Because the design is code, the fix is a one-line change and a re-export.

Only when one unit works in the real environment for a week do you move on to quantity.

Checklist

• Order quantity of one
• Test in the real environment
• Each defect traced to a named parameter
• Second revision ordered before any batch