Accuracy is a question. Anytime you interpret something there's the chance to lose something.

Using a one model to gather information to make another of a different scale? I've done it, I think we all have. Where to draw the line? I would never directly copy another
person's work to directly capitalize on their research and artistry. So for example when Littlefield had his armor collection available here; I was at times a frequent flyer to
his place to measure his T-34, Sherman, Panther, Pershing Hetzer as well as others. If in my measuring I stumbled across the same measurements that Italaeri, Tamiya and
others have done am I infringing upon their work? Are they infringing upon the rights of the US government ( or We The People since WE paid for them) of the copyrights
for the Sherman and Pershing? Who gave it to them?

If your Neighbor's Jaguar F is so alluring that you make a model of it, are you infringing on Jaguar? If you make a model of his house, his home's architect?

We can take it to ridiculous proportions but still: where do you draw the line? I feel directly copying another's work for sale is wrong; using another's work as reference isn't any different than making measurements
from photos found in a copy righted book or magazine. They are all reference materials.

Bosch is still in existence as far as I know yet I see copies in all scales of the headlight with blackout cover. I know reparations trumped patents but even still are copies legal yes or no?

Jerry