Hello, anybody installed the urethane bushings in there upper and lower control arms and have any problems? I am told that they sometime squeal and make noises allot. Are they much better than installing a heavier model bushing like say the 750 model? Please email me direct. I am thinking about installing them into my car and was told to ask you guys here that many of you had bought them. BTW I have a E32 model. TIA