Ok, Ive decided I want to do a 4-link rear end on my rock crawler. I also have noticed that a few of the members have designed and are building linked setups on there trucks. So how about lets have a thread with the basics of a standard triangulated 4 link like Willyswanter did on his K3500. Ok, so what are some of the basics for all of us 4-link "newbies?" Also what are some good books to read to further understand the design theory's that go into making a 4 link truly work as performed? Also what are some ways to find COG, Roll Center and Roll Axis and other various terms I have seen in the 4-Link discussions?