Sitting by itself. Why would you not load it to whatever capacity you need? If it is rated at 120lbs why worry about how much you put there? I mean if I load it with 3/4" drive sockets I don't want to have to think "Well this is only a 26" I better split these between two drawers"
Are you saying it isn't really possible to load it to the limits of the friction bearings because it is so small? If so I won't disagree, but I'm not really sure. I mean a 14x26" drawer would be hard to fit 100 pounds on.
Still just curious about if these actually have friction or ball bearings. They are on eBay all the time.
I am not saying to not load it with the tools you need, but I have seen way too may times people will try and stuff an entire combo's box worth of tools into a lighter duty top box that they end up placing on a cart or workbench for that matter and then complain to the company that their boxes are pieces of **** when the welds break due to being over loaded.
Personally IMO if you are looking for a top box that will sit by itself and you are wanting to put some decent size and qty of tools in, and one that has a drop down folding door on it, I would look into the heavier duty road boxes. They are a bit wider than 26" I believe but in the long run you will probably be much more happier. That is as long as you are not space restricted.
As far as the boxes go that you have listed I dont know how robust the friction slides are on these but if you can find one for a kick *** price then you should probably be alright. Maybe one of the Snap-On dealers that roam this forum can shed some more light on this. I see the truck every Tuesday so I'll run it by my rep and get his opinion if no one else answers by then.