I'm using the bushings that came with the bar - couldn't tell you what material they are made out of. The bar can move but it is stiff - the brackets sent with the bar were poorly designed by Progress. The brackets aren't large enough and clamp down pretty tightly on the bushings - there's a lot of stress going on down there. I tried to reduce some of that by taking the endlinks back a little.Are you using poly bushings? If so, does the bar swing relatively freely without endlinks attached?
Got back my painted side markers, top of grill, and eyelids. Got the first two on, need to find some double sided 3M tape for the eyelids