I'm only guessing, but I would think that the shorter the trailer, the greater impact of weight distribution.
So, if you put a box on the front and filled it with tools, you might have an issue.
I don't have the Escape box, but I do have a storage box on the back of my 17B. I suspect that it just facilitates carrying more stuff than I need. I can't remember the last time I used the 5lb. maul.
Before I had the box at the back, I stored hoses etc. in boxes that traveled in the aisle, inside the trailer and got shoved under the trailer when at camp.
If I get the Old Bag that bike for her birthday, I'll have to remove the storage box to accommodate a bike carrier and go back to my old system.
Still, those that have the Escape box seem to love them.
baglo