To help make the bag even I compare the gather of the current pentagon with the pentagon on the opposite side of the bag.
I purposely used less gather to make this bag to make it floppy. Gather more to make a bag with more snap.
For the knot I did a single, double, double, double, single, single. The direction of each knot alternates so they lock together. Video by Dat Phan.
(Playing time 1145 secs.)
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