We design machines and many of the parts are purchased, we do not know the exact dimensions but want to undertake the design work. We will use a part that is close from our library until we are able to finalize the details. We want to be able to identify these parts as incomplete and in need of finalization by just looking at the assembly drawing. We need a method to make them stand our from the other final parts so we don't go to manufacture with incorrect details in the drawing. Does anyone have a trick they use to accomplish this?
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