I wasn't happy with the first design, so I decided to re-do them. The main issue I wanted to address was fingertip coldness due to the seam running around the end of the mitts. So I ended up making these with a continuous chamber running from the palm, over to the top panel. The thumb chambers are separated and overstuffed.
I also added more down, ~2" calculated loft. Shock cord adjustable closure as suggested, reinforced dyneema gridstop tube for the drawcord. Longer overall, much warmer. Weight on these is now 1.6oz per pair in Medium, which is an increase, but a warranted one IMHO.
The blue pair in the pics is ready to ship for $65.
After they're gone, I'll only be making these if you send me a good bottle of Anejo Tequila (or an exceptional Repo/Blanco), or some other cool trade. Sorry, I'm the boss, I get to make the rules. ;)