Your struts SHOULD NOT BE WORN at only 40k miles. I have original OEM on my car with 120k miles and while im sure they are not perfect, they have passed the free dealer exam every year. There is something wrong. Have you put lowering springs on your car? Do you carry allot of weight in the rear? What do you mean by "chopped"????? Please excuse the phrasing but when you go to the dealer do you act completely ignorant of cars? If so this is viewed by many as a free ticket of a holiday bonus
Learn automotive terminology and go to the dealer with confidence, since joining this forum I seem to be able to "out talk" many mechanics at the dealer and sometimes I even confuse them, this scares them into not screwing with my price by adding parts not needed.