In regards to snowman's w900 nice job & as for one's saying this & that I guess they have to see pictures but, I thought model building was what your Imagination to what one likes or thinks. posted a few pictures of flat top sleepers. I was in auto transporting for 23years & the reason flat top sleepers they were light. I had a pete & stinger trailer weight empty was 44,000 lbs some southern states pushed the 13' 6" height law. Today you can go from brunswick ga to long beach or tacome wa 14' foot high came about is because, vans & autos got bigger & heavy so to get the height down on auto transports western star first came out with flat top sleepers. A auto hauler (wagoner) had also cut tops off & flattened them out on some rigs than put a port hole air vent in celling for air. drove this truck for them & I can tell you you wouldn't get up to quick without bashing your head.