Thanks for the response about the cuben baffles. It seems safe enough to use so I ordered some from Joe this morning.
1.) It looks like you didn't utilize a drawcord for the footbox, presumably to achieve that trapezoidal shape. Have you experienced any draft problems in the footbox as a result? Any other problems or perks with this design? You mentioned that 38" was a bit too large for your feet, how much do you think it needs to shrink?
2.) How many mitten hooks, D rings, and tiny drawcord locks are you using? It looks like 3 mitten hooks, 6 D rings, and 3 tiny cord locks. Additionally, how has this D ring, mitten hook, and cord lock system worked for you?
3.) About how large is your head opening baffle? No more than 25" I'd think.
4.) The top channel is just a 5" linear piece of material folded lengthwise and then sewn in place. That seems quite small in comparison to the other baffle chambers and I'd like to know how compressed the down feels with the 2.75" of loft.
5.) It looks like the omni-tape at the footbox doesn't follow the taper, was this intentional?