Whenever you classify a part in your partslink structure, you should see the thumbnail of the node you are classifying something in on top of the attributes window. This would give you a handy overview of what the partlink attributes actually mean. You could for example add a small schematic picture, indicating a few measurments the user needs to fill in. This guides the user to fill in the right properties.
you should also see this thumnail in the classification search for the same obvious reason: Guiding the user to search for the right attributes.
both places will stimulate the use of partslink, the reuse of models which will lead to a reduction of the customers cost.
Take into account that you might want to switch of this functionality aswell.