My girlfriend accidentally put power steering fluid in my brake reservoir and now i am having problems. I was told that i would have to change the whole braking system(master cylinder, calipers, wheel cylinders, and hoses). This seems like it going to cost a lot. I was wondering if i can use rebuild kits on the master cylinder, calipers and wheel cylinders since its the rubber that is affected so that i can save on cost. Is that wise and will it be less expensive?