I ordered both a FUD and FD version and they arrived today. Ladders were broken on the FUD and some parts of the ladders were missing due to the breakage. The FD version had minor broken elements: two of the horizontal "wires" near the hopper outlets. Sorry, I don't know the terms.
The FD version was only slightly less detailed. The ladders are a little clunkier, but they were intact and only one had a minor break. The brake wheel looked good, but again was a bit more crudely rendered.
Interestingly, the rastering on the FUD is horizontal, while the FD appears to be vertical, and the FD rastering is much less apparent to touch and visually. I'll try to post a photograph, but they are difficult to capture in my lighting.
Overall, I am really impressed with the 3D model used and the results of both. The FUD is clearly a finer model but as others have mentioned, fine details like the ladders are probably too fragile for working models. The FD seems more robust and the rastering seems less apparent.
Thanks for posting and making this superb model available! I'm going to contemplate how to work with these, but I think brass ladders will help. I'll keep you posted
Cheers