Can i fit polyurethane bushes to the wishbone of my williams, and polyurethane to the inner antiroll bar, but put rubber on the outer roll bar? I have the polyurethane for these but the company doesnt do the outer antiroll bar in the shape i want. The price is pretty much the same but i couldnt be bothered to send them back if they could be used. I figured that the bushes on the antiroll bar are more to hold it on than anything else, and it would be more important to have good bushes on the wishbone where there are more forces and movement. Anyone help?