I have the same concern as I finally got a chance to get some measurements. The inside locker measures 20" at stern and 23 1/2" forward, the length is no problem. My question is how does a 50x24x24 fit into a 50"x23 1/2"x20" space without causing stress issues overtime? It seems that the 750lbs sacs 50x20x20 would be the best fit. I also wounder are you getting a full 1100lbs or is it more like 900+lbs? Anyone care to comment?