I use a heavy shop built Hydrabed style one mounted on an old army 6X6 myself, but I've noticed that young and nimble folks tend to prefer the parallel squeeze types like the old style Deweze. They can flip bales, stack and perform all sorts of tricks with them and are quite happy using wireless remotes. In fact, I'll bet most have searched the apps to see if they could operate it from their iPhone! Lol! Most, stiff necked old farts like me prefer the pivot arm type like the Falcan that open wide enough to (hopefully) give us a peek at the arms through the side view mirrors and prefer a cord on our controller so we can keep track of the dang thing. Deweze makes a pivot style one too. Nobody has built a bed yet that couldn't be broken! When it's 40 below and you are bouncing over frozen ruts carrying heavy icy bales, sooner or later, either the bale bed or the truck's going to fail!