PM him, he will get back to you.
How about get her a golite 20 and lap the tops together with stick on velcro or something like that. Not sure that would work though.
Or just get zip together sleeping bags. I know thats not UL but its an option. Expensive though and heavier.
Not sure if campmor 20s zip together.
Although climasheild is more bulky its not that bad weight wise. It was just brought to my attention that it is equivilent to about 600 down fill, warmth to weight.
Not sure how true that is, but I am building a 2.5oz XP overquilt for my ultra 20 for winter. Should extend it down to about 10-15 then the rest to 0dF with a bivy and clothes.
Its going to be a bit heavier than I originally wanted because of the extra girth to go over and around the golite without scrunching the down.
It will end up as a summer quilt alone good to about 45-50dF.
The actual area is 3.33 yards for now, so you can figure out how much a XP quilt would weigh, IE 1oz cloth 6.66 oz
(yikes I dont like that number, better resize it)
and 3.33*2.5 so overall about 16 oz. I know you can do a normal size 2.5 xp quilt in about 12-14 oz. One for your girlfriend would probably be about 10-12 oz.
If it really is 600 then the difference in weight between it and 750 down would be about 75-80% for down.
The additional bit of weight does not bother me, but down just last longer with repetitive compression.
I guess if I do the normal drop it in the bottom of my pack and dont overcompress it it would last longer.
Oh and the fabric, I got luckly and found 14 yards of 1 oz ripstop and 8 yards of DWR 1.1 oz ripstop at walmart for $1.50 per linial yard so I am set there.
I would not think it would be a waste of time to build an XP quilt. If a topper, it will put the frozen condensation layer into the synthetic outer quilt rather than down so thats a good thing. Besides that if its a square quilt, you can just open up the bottom flip it inside out, add insul, take the old stuff out etc pretty easily. A square climasheild quilt is just basically 4 edge seams.