Got the Atlas 70-ton Covered Hopper the other day.
Nicely built model, very heavy. The model is gray, I thought these cars were black but looking at the photos in Paul Faulk's book I do believe the gray is correct (or it's a very faded black).
I got the 3-rail model, but removed the claw couplers and add Kadees, had to drill new holes in the mounting pads and cut off the claw coupler mount so it would swivel without hitting the Kadee coupler box, took about 10 minutes.
The only "issue" I can find with it is the hatches are turned 90 degrees out from where ACL had there's. It may not be a problem though, they look like they can be turned, the housing the hatch is on appears to be a separate casting, will find out later and attempt to turn them. they do open so that's a good thing.
Anyway, here's some photos:
Well...the hatches do come out, that's the good news.
The bad news is that these "square" hatches aren't. They measure 21/32" long and 19/32" wide, a 1/16" difference. In order to turn them 90 degrees I'd have to cut the openings in the roof 1/16" bigger going from end-to-end and add 1/16" spacers going from side-to-side so the hatches won't fall thru the holes.
It's something that can be done, but I'm not going to mess with it now, make it a later project, although every time I run it those hatches will be staring up at me 
