Heels,
This one took a little analysis. The knee bend is the problem if you want to get more to center with your
clubs. As you bring your knees up to slightly bent from overly bent and drag the club on the ground to its natural position. You will notice the the deloft come out of the club, the club will go to square and the hips will work less to the inside.
To get into this position try the grip and posture drill on the home page. It is a big swing change, so you have to ask yourself, do you want to play with it or higher trajectory. That's one I can't answer.
Hope this helps,
GolfBald