Looks pretty good to me, maybe try wet-forming them on a block of wood that has an exagerated (or cut-in) slant to it. This would essentially force open the bend when closed on the pouch and make a tighter seal. If nothing else works, perhaps using a head-knife, or a skiver/grooving tool, along the inside of the bend would make it crisper.
But, like I said, it looks pretty good to me and will eventually "settle" into place most likely. You're donig another outstanding job, SC. Run with this.