Not 100% sure where this would best be put. I'm modeling GN in the early to mid-60s, and while there were a number of F7s and the like on their roster through to the BN merger, these were the years just before they started selling/trading some locomotives. Given the existence of more modern and heavier power, what role would an F-unit typically have in, say, 1964? Not looking for GN-specific info (unless you have that, in which case let me buy you a coffee or a beer!), but just more of a general idea of how they'd be used. I've seen some photos from the 60s with GN F-units in front of both passenger and freight consists, so I'm not worried about finding a use for these Kato F7s I have, but would these be more likely to be second-line or local service?