A question for all the new Superfly owners, with the removable doors....

I just received mine yesterday, and very excited. Always great quality and craftmanship. I have only set this up twice now....but both times, I am getting decent gaps between snaps on the doors.

So, am I not pulling the tarp taught enough? Not steep enough? Is there a way to judge this? Dial it in? For the price, and quality, I am sure these have a better fit than I am acheiving in my set-ups.... So, a little help and guidance?