Just got back from my quick run. High cross winds buffeted and pushed the truck and trailer around just a little. Top sustained speed was 80mph fer about 5 minutes. Nothing ripped off, shook off, or fell off. I only had to stop once to fix the upper gap cover horizontal flap on the right side as it had popped up during one of the gusts. I don't think it will be an issue on the upcoming drive.
I did find it interesting that the upper gap cover stayed flat on top of the trailer this time around. I guess cleaning up the aero cap and all the gaps from the rough build helps.
I do want to have the hitch rebuilt as the original angle iron they used is twisting out of shape. I need to find someone to build the crossbar out of 2" square tubing like I wanted in the first place. Time to go shopping again.