Ive heard the opposite with poly bushings when you do the grease fitting mod, Jordan Y. did the grease fittings said the car was more compliant over rough surfaces and stopped lanching th car off bumps like normal. I've done everything to my suspesnion (same parts SPL) with the exception of Z32 uprights and poly upright and LCA bushings (I have and need intall) and my car isnt bouncy. Its a bit harsh but I think its liveable. My only problem is bind. I lift the inside wheel if I go into a very sharp low speed corner. Eventually with in the next year I'm going to do sphericals also. I just didnt want to spend the money yet and I dont want them on my only car, I'm waiting till I pick up something for a daily.

Dan, I think you've been driving that Mazda too long!!