I LOVE when a fellow enginerd chimes in with data!
I have some opinions on the Bush 270XT (not max). I think the rear coverage leaves a little to be desired due to the angle of the last rafter arm. It cuts the rear of my vehicle off at an angle and during rain events, the spare tire gets wet. Consequently, the fold out table that's attached to the spare tire swing also gets wet so I have to adjust my kitchen accordingly. My old Batwing had better coverage than my Bush but it's all a compromise, as we all know. I've stated this before, I don't care about covering the driver front door area and wanted a tad lighter awning, hence my choice of awning. YMMV, as they say.
Again, I knew all this going in but my priority was ease of setup, ease of zipping up and a general "no fuqs given" attitude when it comes to wind. I simply don't give a poop if a wind gust comes up with my Bush. I don't panic and start looking to guy everything down
Flapping of the panels during wind is annoying if you're trying to sleep so if you guy down the mid-spans using the D rings, this totally eliminates the flapping as well makes me feel better about going to sleep with the awing being deployed all night.
I'll be doing the AZ Peace trail next month and it'll be windy! Spring time in the SW brings a lot of wind.
My pics above show this already but I made my own mounting brackets and I don't have a roof rack, FYI.