Yeah he mentions in the chapter there, that he'll explain the other nodes later -not very helpful as its all related here on these pages.

I'll have a look, I know a simple way to do the same thing so I'll see about writng it up.

If I were to recommend a book on rigging it would be Character Creation in Maya by Chris Marafi -just excellent. I have had this book for years. Its still available. I learned alot from it and use certain parts of it on my own rigs. I use the different parts of things Ive learned over the years and applied them to my rigs so I get the best of everything and its also very simple. You also may want to download our latest tutorial Volume 3 of Surfing with the Alien. I did a whole rig setup in 9 chapters including cloth, making the whole thing painless to do.

anyway I will look at this and see if I can shed some light on the matter for you

Jay