re: Any drills work to eliminate a bad over the top swing?

I fight the same problem.

Take the club and put it in your left hand. Take the club in your left hand and stand it vertically on the ground in front of your right foot.

Then practice the downswing with only your right hand. Make sure to really feel the right hand passing inside the club still in your left hand.

Helps me every time and if I’m hitting it poorly I will do this before every shot.