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The hard part isn't the 3D. It's the rules.
Which sizes exist, which finish doesn't go with which motor, which option changes the lead time. Today those rules live in the head of someone on the technical team. We write them down with that person and turn them into a configuration engine that won't let anyone order the impossible.
The price is calculated with the same rules your technical office uses, so the number the customer sees is the number you will invoice.