You know, I don't think I do actually. It should be a reverse color image of the front but will have those drifts of color. I usually cross twist the threads every 3-4 stitches so I don't pull it too tight across long sections. The worst thing with this kind of knitting is getting the tension right. If the threads on the back get too tight they will pucker the front. The good thing is that the knitting doesn't need to stretch since it isn't a garment. It's going to be lined when you're done anyway. Blocking will usually minimize the places where two needles came together. If they don't look too good I use the tip of one needle to sort of work the excess into the stitches on either side until it isn't very noticeable. Wool works well because it's so much more forgiving! The problem with cotton is the lack of springiness that would make these places way less obvious. When I've used silk I find it less of a problem because of the slippery aspect of the silk. It tends to sort of tension itself without too much trouble. Are you coming to University? Maybe we could meet and I could have something to show you the back of by then. Heh, it will make me get to work on the new purses!