More to explore:
double needle tutorial
How to use a twin needle with tips and tricks for hemming with knits and how to use it for decorative stitches.
Double needle tips
▶ Sewing with a Double or Twin Needle - YouTube
use double needle, but on the wrong side
Pintuck feet and needle sizes
Sewing 101 - OneTip That Changed My Double Needle Sewing
Great info on what size double needle to use with which pintuck foot
Troubleshooting your twin needle stitching
Hemming jeans the easy way ~ I like using the original hem, but it you need to cut it off, or don't like that method, this is a great tut!
Using a Twin or Double Needle. Tutorial: sew4home.com/...
How to Use a Twin Needle #NationalSewingMonth - The Sewing Loft with @Deby at So Sew Easy from So Sew Easy #NSM13 #sewingtip