I mean I have enough material to make the door more triangular, or “beak” like, but I don’t need the storage of a vestibule and would just save the little bit of weight for the extra fabric and use a flat door. My intention was to use snaps at the corner tie outs and an overlapping flap to run down the side of the tarp, basically attaching exactly like the Echo beak. Except that it would be flat. I planned to attach a grosgrain loop at the bottom center of the door so I could pull it taught and stake it out. I would obviously only use the door in storm mode where the tarp will be pitched to the ground anyways so the door will be to the ground as well and I can just stake it right down. Is wind an issue with a flat door like this? I mean this is basically like the back side of the MLD Patrol except my flat triangle will be a bit bigger than theirs since my 9×11 tarp will not be tapered.