>>Right, I understand. But does that mean it has to always be that way? I understand that sometimes changing a system can be expensive, so I'll just ask it as a question.
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>The proper way would be how I did in the other systems. Make and Model are tables with the choices. Integers are used in the main tables and searches are done in the integer, by the use of dropdown list and this is highly optimizable.
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Yup, exactly.