just a tip to all. if your canopies top is a little loose, just push up on the middle post and pull down on the frame, then put some vise grips on the middle post to stop it from going back down. instant tight top, no rain bladders in the morning.
Sam's Club sells an EZ-UP 10x10 for $200. It's heavy duty with straight steel legs and comes with 3 roll-up sides and an awning. I used one for 50 trackdays/6 years in windy conditions. The top finally gave out so I just bought another one. They're still selling the same model I bought in '06.