The bench is perfectly square. It's also perfectly level. I offset the screws so I could drive screws from the other side too. It's symmetric as in each joint is the same. I pre drilled the holes with a #32 bit and drove the 2.75" screws in.
So, I built 2 AKs on it yesterday, and now the top is all stained and dented. I'm glad I didn't go with the hardwood top.