Yes, you can do wheel position weights with a CAT scale, but it's a PITA due to the framework for the CAT advertising sign over the one end of the scale. Because of that frame you might be challenged to get the coach on the same pressure plates with one side barely off the scale. If you can't do this you'll have to do 2-3 weighings. You'll have to back the coach up so that you aren't up to the CAT Scale sign frame. If you're lucky, the steers will be on one platform and both the tag and drives will be on another. If this is the case, I'd call it good. There's not much of a chance that the side to side difference is much between the drive and tag so an aggregate weight on one side of the combined drive and tag should be good enough. Otherwise, you'll have to back on the scale to get the drive and tags off the one side of the scale and on 2 different pressure plates.