I think when I got my first ZTR, a Grasshopper it recomended backing up the ramp so I have always backed my ZTR's onto the trailer and have a chock to stop the mower where the balance is correct. I also strap it. I notice most people drive them on front wheels first. I have a single axle trailer and only haul one at a time. Any body else do this? I may have just imagined it but I was sure I read in the Grasshopper directions to do this for some reason (saftey)?