Nice looking trailer!
Just a thought. You might want to consider making the lid deeper/taller. You would be amazed at the space you get by adding an extra 4-5 inches to the lid.
Mine is about 6". I can stack 2 action packers, and really load that up. When I travel, I store my soft doors in the trailer, so I can run those once I'm where I'm going (they suck to use on the highway on a long trip). Loaded, mine weighs around 1250 lbs.