In my best Crocodile Dundee voice:
"That's not a bench, this 110 pounder is a bench"
Ben Dover
That's not a bench that is ridiculous...
The op asked for a bench for shooting prairie dogs all day, carpet tops wear out your elbows, 4 legs never sit level and you would get a hernia trying to move that monstrosity around. Three legs and a 360 degree swivel will get you on prairie dogs without all the weight and hassle of trying to cart a bridge around. You might want to try shooting a PD field some day and tell Crocodile Dundee to go play somewhere else...