I have switched to larger heavier batteries. The two wheel trailers I have been using are a pain now. Not pulling them as much as moving them around. I think what I need is to build a lil red wagon on steroids. A trailer with four wheels and a tongue like a wagon. Wheels from my scooter wheel trailers, and a tongue with a joint in it so that I can stand up and pull it around. Have any of you guys built anything like it. Prelim drawings.