Well, I couldn't take it any longer. I have wanted to build a trailer to pull behind my trike for a long time. After seeing what others have done, I thought I would try. Paid $20 for the car top carrier. I bolted the trailer together, squared everything up, ensured the tongue was straight, then welded everything. I went with 12" wheels to help keep wheel speed down as well as shifting the center of gravity forward since the tongue slopes down toward the bike when connected. Empty tongue weight is 18 pounds at ride heigth. Pulls great empty. haven't tried it loaded.