Ok, I posted an earlier version of this stand with just two posts tied back with straps to keep them from collapsing in. With all the input from here, I made some changes. I swapped from pine to treated Douglas Fir that I got from a construction project I have going on at work. I quickcreted the 4x4 posts in 2' deep. Then I added a bolted on 2x4 center beam. This thing is now rock solid and I'm much more pleased. Thanks for all the input earlier.