Got a hustler super z that while hauling seems to roll on the trailer. I have noticed it when I accelerate from a stoplight/stop sign. I don't drive or pull away fast, but looking in my rear view I can see the mower pivot with one drive wheel locked and the other rolling. It does it on either side. It doesn't matter if you drive on or back on. My trailer has wooden floors and rails so it's not going to fall off. I don't want it banging into my Walker and messing something up. I have thought about lockers, but I have so many different trailer configurations that I would have lockers everywhere. Can you tighten the breaks? Any suggestions?