It is essential to use a twin needle when you are hemming a knit. The back of the stitch, (on the underside), is indeed a zigzag and this is what gives your garment the "stretch" it needs so that your stitching doesn't break when stressed. As for pintucks, I love pintucks. There are several different feet that give different looks and several different widths of double, or triple,needles to acquire those looks. You can use pintucks on the yokes of little girls dresses or the yokes of nighties. Several rows of serpentine pintucks run vertically down a yoke, using one of your machine's special stitches are exceptionally pretty. You just need to remember to stay within the limits of your pressure foot opening so that you don't break needles. I have often used pintucks as inserts on a pillows. People are amazed to see them because not that many people seem to use the technique anymore.

My daughters and I use them to stitch the "leading" on stained glass quilts. Beats single stitching both sides of the 1/4" bias tape!!

P.S. I have another kit of this quilt for sale.

When you stitch-in-the-ditch using those makes an interesting look. Center your walking foot along the seam and your needles will be just a tad to each side. On the reverse it is a little different but you are not suppose to look at the back!

I meant inspired - hehehehe

You can handle curves fine if you reduce your stitch length.

I just remembered I do have a picture of something I did with a twin needle:

Lovebug, your Pillow with the Black quarter inch outlining is absolutely beautiful. Thank you so much for sharing!!!

Well thank you very much! It was something I had sketched out and was intrigued to see if I could turn the sketch into an actual quilt. Well, something "quilted" anyway. :)

I have the twin needle with my machine, too. I've never used it. I'd love to see some pictures of projects that board members have done with the twin needle.