This is my trailer. I got a skeleton trailer from a friend of mine last Friday and yesterday I made a new platform and rails for it and this morning I made a removable roof so that I can use it to take my blind, diabetic dog to the dog park. She loved it and with a gate that swings, it was easy for her to get in and get out. I used light weight pine for most of the construction and it weighs about 30 pounds. With the roof off, it is a cart.