The first time I saw an E Track trailer I thought they were a good way to ship rough freight.Claims would have to go down and load averages would have to go up.Then I realized you would need to be real careful how you loaded one,having too much weight setting high wouldn't be a good thing.Just like the old way,heavy freight on bottom,light freight on top.Every time I read or hear about a pup flipping I wonder if it was loaded right.About the first thing people ask is how much weight was on it.Nobody thinks about where the weight was at,on the floor or in the air.