I ordered a non-mesh inner tent from Bearpaw Wilderness Designs. I am guessing(hoping) that it will be around 16 oz. This adds about 14 oz instead of the groundsheet.
I tried out my quilt the other night under just the Hex and was just comfortable at 40F, with all my clothes. The average low is 35, which I hope will be offset by the added warmth of a second person in a double wall tent. If it get's close to the record 25 I will be very cold though, not hypothermic, but uncomfortable! I was also a little worried that Andrew Skurka lists a heavier quilt and down jacket than I do for similar temps, and I am a cold person! If it get really cold, we could spoon and layer the two quilts on top of each other, slightly offset, to keep them tucked in.
I would like to have some more insulation, but I can't think of a way to add just a little bit of insulation and weight.
Bringing a second insulated garment is a waste of the double shell fabrics. For example, if I bring my lightest insulation layer, a Thermawrap vest, that adds 6.4 oz, most of which is in the shell, which hardly adds any warmth inside a sleeping bag in a tent, since I am already wearing a shelled garment and a windshell.
For that same 6oz, I could bring my mummy bag instead of a quilt. It has about 3 oz more down, and a great hood, but can't be used very easy when awake.
If it get really cold, we could spoon and layer the two quilts on top of each other, slightly offset, to keep them tucked in.
The next warmer garment I have is a MB alpine jacket(not the alpine light) very warm, but it weighs 18.5 oz, that's 11 oz more than my UL down jacket, and only 4 oz of that is down.
If it get really cold unexpectedly, we could spoon and layer the two quilts on top of each other, slightly offset, to keep them tucked in.
What I would like would be a jacket that adds about 3 oz more down, to the 2 oz in my UL jacket with only minimal 'dead' weight added, for a total weight of about 10.5 oz. Unfortunately the only jacket I see like that is the Uber -expensive Shaka plus...
Edit: better description of Warmer jacket