This is one of my favorite ribber techniques, and I hope you will try it!
You can create a double-thickness, fancy two-color pattern that is beautiful on both sides. It's like a photo negative in that the background color on one side becomes the foreground color on the other side.
Many of us have done this in hand knitting, and it's quite an exercise in counting stitches. I used to try hand-counting it on the knitting machine, and I did not have the patience to do it. However, using the patterning capability of a Brother machine with a ribber, you can use the machine-selected needles as a guide to hand-count the needles on the ribber.
'Nuff said - more easily seen than explained...
And also, Happy Mother's Day!