That looks great! My second thoughts were, how are you going to seal it up? I remember you originally had angle on the edges but got rid of it?....because you made the opening larger? Also, I know you say you have 750lbs hinge rating but when you compound them you lose rating. The trailer itself will lean to compensate for this. I have two 500lb hinge in series that give me 80" total out from the trailer and you will need a leg. especially if you have your stove out on the end. I kept my stove on the first set of sliders to help with this just so I dont end up with a big pot of water 80" away from the trailer. It looks really good! Keep posting pics! I cant post any pics of my trailer cause my camera was dead this last trip and I dont have any time right now. I will get them up soon.