mate your link doesn't work for me anyway! I have a portable bench which is 2.5 in each direction and has rollers in each (wing, left and right). But a plank or lvl or similar on a couple of saw stools will do for the occasional user. Having said that the amount of guys I see with this set up is unreal and blows me away as I could not cop a half arsed bench setup especially when it is your livelihood!