my girl has had a double hip replacement but loves the gs and is fine on the back but i know a backrest would seriously help i dont need a top box ,does anyone know where i can get one or has anyone made one.
"having a few inches of rope for her to steady herself ".....is this a joke?

I personally would not trust the vario top boxes to use as a back rest.I have had two top boxes and both came off of their own accord,yes correctly attached and had been for miles,now i have it pinned as well.As I recall there were threads/posts about it happening to others.
Would the box be the 1200gs plastic top box. There is a free up grade repair for this now.