I had a tabletop a that I wanted to use for extra work surface in our office loft but I needed some legs for it. I didn’t want anything permanent just yet, mainly something quick and dirty to try it on for size. I knew that sawhorses would be the best solution for that but , due to the size of the worktop, would leave no room in front to pull up my chair and have my legs under. Then, thanks to the YouTube algorithmic overlords, a solution presented itself to me…
Make sawhorses with three legs. With about $20 of construction grade 2x4s, a mitre saw, impact driver, course thread screws, and an hour and a half of time the problem was solved.
Beyond the advantage of leaving room for my chair and legs underneath, a three legged sawhorse (or stool, or any built thing really) is that it will always find its own center of gravity on uneven surfaces. Get the measurements slightly off on a four legged horse and it will be wobbly. A three legged horse does not have that issue (though, I did measure twice, cut once, and use a level throughout so that fact is irrelevant here).