One major spotting difference between Atlas and JTC containers is the lack of molded magnet circles in the bottom molding.
The ones I got from evemodel HAD those moldings.
Jim,
The Atlas 45-ft and 53-ft containers do have the molded magnet circles, but they do not include the magnets or steel plates. However, the Atlas containers' molded magnet circles are not at the same spacing as the JTC containers. One has to remove part of the molded in magnet ring to add magnets and steel plates in the appropriate positions with the Atlas containers. You might want to check the spacing of the molded magnet circles to see if they match the spacing used on the JTC containers.
Edit: The Atlas 45-ft and 53-ft containers only have two circles for magnets, not three as found on the JTC containers.
The Atlas 40-ft containers do not have the magnet circles.