Cantilever is in the title Scott.
I used U-bolts to fasten a piece of soft vinyl/plastic (about 2"x2"x24") on each side of the trailer. They were set to center the engine pod as the boat was pulled out of the water. Those familiar with the plastic slides used for snowmobile suspensions will be familiar with what I used, but anything would work. Need to be soft enough to bend without damaging anything, stiff enough to give the back of the boat a shove in the right direction and center it as it's coming out. of the water.