Amckinney,
I bought a trailer just like yours to put a seat on. my wife has ms, I wanted something to cruise the boardwalk. I added a kickstand in front, makes it more stable when your passenger is getting on and
off. I put a set of wheels on the back, that solved two problems, a seat makes the center of gravity higher, there is a little bit of a bobbing
motion. The back wheels smooth out the ride and also makes it easier to roll through doorways with the wheels off. If your on the road those kn
obby tires make a lot of vibration. I put on a pair of whitewall slicks, lot smoother ride. I have put about 150 miles on it, very happy so far.