seems like you learned that trick from someone....
if you roll everything flat it'll pull the fenders slightly just because you're using a roller. if you need a little bit more pull, raise the car up and slowly drop it down with a phone book in between the fender and the wheel a bunch of times. obviously don't rip the fender off doing it, but it's an easy way to get some more pull out of the fenders without doing lots of body work.
on those 17x10s i'd just run a 245 tire and be done with it. it'll be a little stretched, but you'll be tucking the sidewalls when you're parked anyway so it won't be an issue. i would also think about running a 245/45R17 to get a little bit more low out of the car, it'd be about 0.5" shorter sidewall height.