I used a lot of the generic Benroy plans along with some adaptations of my own and some aspects that I used from other plans. It's built on a 5x8 Northern Tool trailer, and it is actually a 5x10 build and the body it 54" tall, I used 5x5x3/4" Baltic Birch joined together for the sides. I also added a Dexter idler axle, springs, and hubs, with 15" low profile tires and a tongue extension. Most of the trim, hardware and the doors are from Frank Bear at Vintage Technologies and the 5x10 aluminum was purchased locally.
I have taken it twice already into the mountains north of Phoenix and just completed a 2,700 mile round trip to check on my mom, so I have over 3,200 miles on the trailer already. I must say that it just tows like a dream, you don't even know it's behind you except on steep hills, and pulling it with my 1/2 ton Dodge gasser I got about 16.5 MPG on the last trip which include going through the AZ and NM mountains and running 65-70 MPH.
I haven't decided yet, but I may put another drawer in the galley where the water bottle now goes since I really don't seem to use it there mostly putting the bottle on the table that I use behind the galley. I also have an external 5,000 BTU A/C that I duct in from the side. So far haven't needed to add a return air duct to the A/C because I try not to stay where it's that hot since I get all the heat I need in the "balmy" Phoenix summers! Right now I use a radio control remote for Christmas lights to turn the A/C on and off if needed.
More build photos and info to come!

Dave Fry
PS: finally got the pics to insert,