Not sure if this has already been done, but it seemed like a simple solution. By sewing in the mitten hooks, this sack doubles as a ridgeline bag and requires no additional connectors. The hooks are sewn in with grosgain + mitten hooks. This one weighs 13 grams and is 8.5" x 12.5".
I think you could make additional modifications such as adding in a mesh side pocket.
On this one I tried to sew a little taper toward the end of the bag to keep things from rolling out, but realized that could be stopped by simply cinching the stuff sack slightly.