jonkoppisch,
What kind of frame did you use with that metal covering, wood? I'm thinking about building another in a few years and making it lighter. Just wondering about durability the metal covering would provide. Also the seams. What kind of trim did you use. The lid on my box weighs about 45lbs. Not a problem now but when I get a lot older I'll need a different type of trailer. My current box is 1x2 frame with 1/4" floor under layment found at the hardware stores. Its still pretty durable after 2 years of use.
Edwin