I agree with the others about not turning the handle.
Topstitching is so much easier also gives you the chance to use some of those fancy stitches on your machine. A inch strip of fusible fleece also works well. Put it down the center and fold the fabric over.
This is a neat tip for turning (when you just have to!):
Make your long tube 1/4" longer than needed. Before you start sewing down the side, insert something long and stiff (I used some stiff rick rack left over from another project) down the center. After sewing down the side (make sure you don't sew the rick rack!) then sew across the end securing the rick rack.
Then, just pull the rick rack through. Then snip off the end. You will only loose a little bit of the rick rack and it can go back in your stash. Easier than trying to use a safety pin. I've done this, it actually works and you don't have to buy yet another notion that you will only use once in a while.