J.W. I have run into this on occasion. The braces up to the hips are a good start, but I concur with the opinion that the timlocks are inadequate. The problem with a roof like this is that only 1/4 of the weight is inside the square formed by the posts. (3/4 of the roof weight is outboard of the posts) I have solved this in the past by creating a heavy structural fascia along with heavy braced hips. I also have some concern regarding overall stability. My philosophy on exterior structures is that parts near the ground will need to be replaced someday. It is more work up front, but I recommend not sinking the posts in concrete. Design a post base connection that allows the post to be replaced in the future. Good luck.
