A few front left and right corner drops on bolts or spring pins to prevent heavy loads. rock and sand, etc. sections together during travel. It seems that all the front lateral force is due to the three rectangular pipes at the lift/turn point. It's a very good build. However, when the bed starts to rise, the lifting mechanism has almost "zero" mechanical advantage (because the mechanism moves in the almost horizontal direction and only a small force component in the vertical direction acts to raise the bed), but as the bed rises, the mechanism exerts a greater force in the vertical direction. component, which allows less total force to be applied (from the crane) to raise the bed. A moment arm at right angles to the bed jib and located at the pivot point where the winch cable attaches should provide better mechanical advantage. The winch cable will be connected to the end of the moment arm, not to the shaft of the hoist.