Most of the inaccurate models were the result of quick-n-dirty kit builds being accidentally dropped when moved onto the set. Set dressers are always under the gun to move very quickly, and it's not uncommon for props to get damaged, especially something as fragile as a plastic model kit. In the case of the silver AMT TMP Enterprise, the kit was repaired multiple times by someone who apparently didn't know the proper configuration of the ship and just needed to get it onto the set in time. Both Rick Sternbach and I offered to help, but we were told that he was in such a rush that he never had time to run up to the art department to ask, and there just never seemed to be an opportunity where the model was available for us to repair.