They really aren't needed. If you have aluminum bulkheads then I certainly wouldn't use the set screws. It would be better for the hinge pins to spin inside the plastic bushings than to spin inside the aluminum bulkhead and possibly gaul up.
BTW, FLM has some installation pictures on their website. It helps a little bit. The spacer setup on the front lower ball joint can be a little confusing at first.
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Last edited by Killer RC; 08-18-2009 at 01:51 AM.