For the record, my comment on the black horns on the old MiniTrix F-7A was in jest. Years ago, nearly all N scale came with black hand rails, brake wheels, horns, and other detail parts. My opening comment on Kato's anticipated re-release F-3 UP locomotive related to the bright pale yellow horns being totally off shade for the yellow locomotive. I have seen photos of prototype Union Pacific F units with either yellow or gray horns. This includes Rock Island patch jobs on their former UP F-9A and Amtrak patch E-9A locomotives that I saw running in Oklahoma and Texas during the 1970s.