I bought a KZ 16BH, single axle a couple of months ago, dragged bottom several times on the way home with it. The first thing I did was flip the axle to raise it up and put on 14" tires. I bought the fittings to flip the axle at the local Tractor supply, took about two hours to do the job. I did several more modifications (added a second propane tank and battery) to get it where I could boondock if I need to. I bought the fittings to flip the axle at the local Tractor Supply, about a two hour job. I have pulled the trailer on one trip to Northern Colorado, 1800 miles round trip, pulled great, I am very satisfied with the axle flip so far. Added bonus is that the holding tanks drain much better due to the increased height.