just bought a boxvan that i want to build a dropgate for. has anyone done this before that has pics or advice on the build. i am thinking that i need a 12' ramp(split into 2 foldable 6' sections). im planning on welding it with my mig welder. just looking for outside ideas to tweak my design. haven't decided whether to add a dovetail or not. all help is appreciated. thanks guys!