The foot control bag is just a little bag to put the foot control and the cords in. With them in the bag, they aren't apt to scratch the machine. I also made a little bag that fits over the arm when it is folded up so that the thumb screw that holds the feet on the machine doesn't hit the arm.
Here is where the Featherweight tote and foot control bag are found.
http://craftyhipster.typepad.com/cra...ight-tote.html
When I made my tote, I sewed shoelace handles between the lining and the outside cover to make handles as I didn't want the handles to show from the outside when I was using the tote as a cover for my machine. The laces just tuck in our of sight. I hope this helps. Someone else on the QB had a link to the tote pattern and I copied it and am helping spread it around.
On another note, when I am sewing with my newer machines, the foot petal keeps moving around on me and I have to hunt with my foot to find it. I found that with my FW, the foot petal stayed put and didn't move on me. Anyone else find this out too?