Looks like a great rtt, but I do have a concern with all of that cross stitching in the quilted fabric. That's a lot of potential pinholes for moisture to find its way in the tent. Am I just overthinking this, or could that be an issue?
I'm a little late to the game here, but the positive pressure idea seems to be a good one. Here's a link to an Australian truck cap that has a positive pressure vent built into the cap. I'm sure one could retrofit one into an existing cap without too much trouble, as mentioned earlier, or...
By sharing your stories and photos, you give people like myself, who won't be able do that sort of trip for a few years, a reason to work hard towards reaching that goal. Thanks so much for the inspiration, and the invaluable advice you have been so graciously passing along.