Looks like I fell flat on my face here. I have been using P4 for quite some time. I was always under the impression that a body part could only have one parent, and that the one parent of the hand had to be the forearm. Therefore I was surprised when I tried the technique mentioned above and it worked. Looks like I have discovered a complicated way of doing a simple thing that every one has known how to do for years. I think I will go and crawl under a rock now.