[bambam]

Trig:

In what direction are your hips sliding on the downstroke? As a hitter, you were sliding your hips cross-laterally. Your delivery line follows your hips. COuld be you are not sliding your hips lateraly, parallel to the target line, thus your delivery path may be along the angle of approch, not the geometric plane line. Your hips could be in the way.

Another good point. When I drive hard w/ my legs, I usually push off my right foot. The harder I push, the more I get my hips moving cross-laterally.

The drill Jim mentioned above has always helped me, too. Anytime I'm not feeling CF, I like to just take a couple baseball-type swings (horizontal to the ground).

The push slice has always been a problem for me w/ my driver. I've gotten most of the overactive lower body issues worked out, and have found yet another (hopefully the last) cause. If I don't really think about setting my weight towards my heels at setup, it creeps towards my toes in the backswing. In an effort to regain balance, everything straightens and flattens - collision + reverse role.