Hi Lefty
When you say you a swingplane problem, is it too steep or too flat?
If you plane is too flat , try the wall drill. Just take your normal set up a couple of inches from a wall ( don;t let your butt touch the wall ) , now take a back swing without hitting the wall , slowly at first,repeat until you get the feel for the correct plane.
if your plane is too steep , aim to swing the club just over the outside of your left shoulder on the backswing. again, repeat until you get a feel fot the correct plane.
REMEMBER TO ALWAYS MAINTAIN YOUR SPINE ANGLE THROUGHOUT THE SWING
hope this is of help
