your springs wont "settle." Settling is a characteristic of over-worn, over-burdened or poor quality springs... ground control only uses the best quality eibach race springs... If you've driven it around the block a couple times, its probably about where its gonna be.

If it rubs, it rubs. Sorry, thats just what happens when you lower a car on 17s :happysad:

BTW, if you just got the standard set, I'm pretty sure your spring rates are 375f/250r.