Hmm, ive made my bushes from delrin and have yet to drive my car but I dont agree with the above point of view as many people use rose joints instead of poly bushes as an upgrade.
the ride quality should be a result of springs and dampers not what is basically a pivot.
my thoughts are that £15 for a metre of delrin will get me rolling and if im not happy with the bushes in the end ill change them but people do use rose joints and there is no give in them at all.
Ray