Greetings!

I am one of the folks who got in on the Red Head group buy and I am now planning my work. I want to change the power steeing fluid and I saw some of the threads on how to do it. My question is should I flush the fluid before or after I change the box? If I do it before, it seems to be a waste of fluid. After, it seems that some of the old fluid will still be in the system. My Ex has 183,000 miles on it. Any suggfestions would be most appreciated.