Thanks for the input everyone.
I was just under it, and as far as I can tell it looks allright, but I really don't know what I'm looking at.
I took a quick video of it in action, is it supposed to move so much?
Video is 2mb if you care to look and tell me if that spring action is correct.
Thanks!
Link:
http://www.mooligan.com/helper.avi
edit: yes it is covered in wayne's book, im looking at it now