So, here's a little show and tell about my lack of sewing knowledge. Say I have a sweatshirt that I have forced into the shape of a pair of pants. And then say I have used the collar trim as an elastic waist band. And then say I have to sew the two misfits together into a harmoniously gathered little waist.
How do I do that?
I buy a leprechaun and pay him sweatshop wage to figure it out. The End.
No, really what I do to force the two different circumferences into alignment is wrap them both around a book, pin them, remove the book and then baste that business.
Where's the 'After' picture, you ask? I would post it but I ran into a crazy secret knotty seam somewhere in there and my serger made *sproing* and pieces flew everywhere. I made the leprechaun recover all of them and we are in the process of re-attachment at the time of this post.
This is not the last you will see of these pants.