I can speak from personal experience about the rear tie-downs, and front "safety attachment". There was an occasion when my winch strap broke, and the only thing that kept my boat on the trailer was home rigged 5,000 pound cable and crimped S hook. I felt something "odd" happen, like a pop, but the road was bumpy, so I dismissed it as such. When I reached the house, and unhooked the trailer, the web strap was frayed. the steel cable felt tight enough to break itsself, and one of the rear straps had come "un hinged" but had held. Sometimes it pays to use protection!