I remember seeing something about this posted here before, but can't locate it. I have a mid-arm machine and frame. When I have "special" quilts, off they go to the LA. She always sews around the edges of the quilt, I assume it is to hold it together for when I bind it.
Today I finished a small wallhanging on my domestic machine and decided I should probably sew the edges. However, when I did, I ended up with several puckers and ripped it out. This was not from a pattern and was pieced together as I thought about it.
I am not sure if there is a trick to it, or if my WH was a little wonky.