http://www.youtube.com/watch?v=Fa8bGfexpLs
This kinda shows you what your looking at...I do it by feel, but I used to used parts bag plastic on my Buggy Instead of paper, I think you deal with alot more chassis flex in 1/8 scale off road...
Hope this helps. Skip to the middle...
http://www.youtube.com/watch?v=Fa8bGfexpLs