I have a couple of the latest release Atlas CZ cars I've noticed two differences vs. earlier releases. The first is that the stainless color was changed. It isn't a bad color, but it doesn't match the earlier cars. I'm not happy about it but for now I can live with it. However it makes me want to model the Expo Flyer just before the CZ was inaugurated with a few CZ cars.
Second, Atlas changed the rollers to an unplated copper roller. I've had them on the table since I received them. I tried them out yesterday. The lights flicker a lot, whereas the earlier releases don't have the same problem. If others are having the same problem, I'd be interested.
I'm wondering if Atlas is using copper rollers on their latest F units. If anyone has some Id like to know if the rollers are copper and if that is causing a problem.
One comment about the Burlington F's. I'm surprised that Atlas used the wrong pilot, whereas Lionel got that detaii correct. Atlas used to be better than that. Atlas also painted the lower part of the battery compartment black. I've yet to see those F's in their early CZ passenger days with anything but silver. EDIT - It turns out that they were black as delivered and ran that way on the Exposition Flyer. I'm still looking for evidence that the were still black on the early days of the CZ.
I've become fascinated with the very late Expo Flyer / very early CZ. I still think about picking up those F's. The paint isn't a problem and I assume the correct pilot is available from P&D.