C'mon, brother, you're so close to getting out of the 500's! I find that when I get near a certain goal, I hover there for awhile because my body has adopted it as a "set point" and is hesitant to let me drop below it. I'll bet that you can easily get there in two weeks if you really put your mind to it and your heart into it. Stay encouraged, and keep posting so that others can cheer you along!