It's about the exact size I was planning on. I have this old table that I'm going to be using. It's 43" x 43". In the picture I have 3 of the leafs up but you can see where they end to get an idea.
No it has 4 legs. It's round because the leafs are up on 3 sides. They fold under the table and then it's square. The legs are 4x4 posts, if that doesn't hold the machine then I messed up and built it out of rocks.