I've prepaid ordered one of these twin hexamids. Joe was able to accomodate 2 mods for me:
1. substitute a #5 zipper -- I have had two #3 zippers from other brand tents fail on the JMT and I want a more durable zipper. (the vendors behind the other tents helped me afterwards so I have no vendor complaints, I just am one who appreciates a more durable zipper and am willing to lose 1 oz weight (approx) for that better zipper.)
2. he is making a .6 oz/sq yd cuben fiber ground cloth that at one end is bathtub-shaped and the other end is velcro'd to become similarly shaped, for use in a strong rain, weight is 1.8 oz. This light of weight of cuben fiber could become punctured by the ground, but I will bring housewrap sheathing tape which works fantastically well with cuben fiber, to repair any punctures.
PS - this is a prototype as well.
When I get the tent I will post photos. I also ordered it with door options.