I decided to take the plunge and spend the money on ProLockers for my Gravely 36" walk-behind and 260Z. After the company I work for got pulled over by the Motor Carrier Division earlier in the week and I found out what is really needed to be legal, I decided that it would be the smartest thing to do instead of messing with straps or ropes or whatever to tie down my equipment. Although they were expensive, I think this will the be easiest and safest option for securing my equipment. I had no problem installing them, quite easy actually. The only problem was with the way the front castor on my 260Z fit into the ProLocker. The fork part (metal part that holds the tire on) of the castor wheel would hit on the adjustable piece at the front of the ProLocker. I solved that problem by simply driving the tire in backwards, as shown in the picture.