see my pictures. its easy enough i used some bearings to my rotation easier only a few pounds from engineer supplies or blag off site. a bit of rsg to make ends and brace and bit of tube to fit through bearings oh and a piece of rsg to mate up with bumper mounts, the brace piece along floor i made out of two pieces so as to make it adjustable, find a mate with a welder 2 days tops i also fitted industrial wheels so i could move it in and out of unit.
i sold mine on to a guy who refurbs mustangs he was well pleased.
if you factor in the earth's rotation, we are all speeding