thanks for the information!Okay the lightest trailer you could make with any real strength would be a foam body with hand laid glass on it. a 5 by 8 tear drop body could weigh less than 200 lbs. But its a lot of work, and wont be the greatest when it come to puncture resistance. If you put more glass on it to make it more resistant to puncture the weight adds up quick. This is where you get into using premade skins and making your own panels.