pete … have you look at the trekker tent in the UK? … i just ordered a stealth from em, mark the owner indicated that he tests the stealth up to 65 MPH winds just fine … the 40D sil version is what he uses in his 4 season tents as well
i dont own a duplex but an interesting thing jumped out at me when i was researching it
Yep i’ve had the exact same problem, i asked for suggestions earlier in the thread, i’ve looked at possibly using velcro and have though about your idea of using loops on the inside of the door.
My new Duplex arrived earlier today so plan on experimenting, please keep us informed if you find a better solution.
This and the fact that you can’t have the bathtub floor upright with the tent set really low are my biggest worries with the Duplex.
We had a terrible time in strong winds and torrential rain, the rain would cause the doors to flap or even worse bow out which would then carry the rain in.
All our kit got drenched and there was not much we could do, in the end i positioned my rucksack and waterproof jacket so they were wedged against the hiking/support pole this prevented the worst of the rain getting in, but not all.
If i ever find myeslf in those sorts of conditions again in the Duplex i will stake out each door separately to try and get them tight and with some overlap.
I find it really strange that they’ve invested time and thought into making a version of the Duplex that’s free standing
http://www.zpacks.com/shelter/duplex-flex.shtml
But they’ve not addressed the 2 major problems with the tent in bad weather.
If they made a version that had doors that could be kept closed by zips or clips and had a bathtub that performed as a bathtub with the tent pitched right down to the ground i’d buy one straight away.
———–
Yes, in high winds, the outer door catches the wind and bows out. In addition to the stick-on-loops I also ordered the stick on Velcro patches thinking I would apply to the inside of the outer door and the outside of the inner door so they would attach and stay together. The problem with this is on level ground everything lines up. But on uneven ground, which is typical, the tent gets a little skewed, and the Velco pieces may not line up. I’ll experiment over the weekend and see how this works out.
https://backpackinglight.com/forums/topic/100642/page/6/#comments
and this is what happens when those brit conditions push a tent beyond its capabilities (not the duplex fault)
What tent was it?
Zpack Duplex (0.74oz cuben)
What failed?
Corner tore
Why?
Used in conditions it wasn’t really designed for
What was the weather like?
Some of the worst i’ve hiked in, after we’d dropped down from the tops we saw uprooted trees and a roof off one of the farm house outhouse buildings.
Read 90mph winds when we got back to civilisation, no way of testing
It was windy enough that when it gusted it took us off our feet and carried us around 1 meter airborne.
It ended up as a 12 hour exercise in dropping to the floor to hug a rock and having to hike between gusts
The wind and rain were bad enough, but around Sprinkling tarn it was being whipped around by the hills and was coming from every direction.
We’d have our heads pinned under the fly 1 min then our feet the next.
Been in windier conditions but always managed to find some shelter, no shelter at our location this time
Where?
Sprinkling tarn
etc etc
Returned tent to Zpacks, even though i told then it was being used in conditions it wasn’t designed for they offered either a full refund or a replacement tent.
Went with a 1oz replacement tent, they didn’t charge for the extra costs of the heavier material.
Great customer service

http://www.trek-lite.com/index.php?threads/tent-failure-thread-storm-damage-degradation-etc.1527/
i must say you brits REALLY test out a tent, no faffing around there … or you folks get too drunk at the pub to set up a tent properly then exaggerate the weather
;)