To avoid letting the rails hit the shafts learn to rock your shoulders up and down to move the putter. The best set up posture is to have your upper spine, forehead and chin as parallel to the ground as possible. This creates both the best shoulder plane and optical alignment plane. This picture illustrates an ideal back swing arc. Look closely and you will notice the back left tip of the rails are slightly closer to the shaft than the front tip. The rails appear almost square to the intended swing path and the face angle has almost no change. On the forward swing the front of the left corner of the rail would be very close to the shaft like a mirror image of the back swing. To work on face angle at impact simply put an object such as a tube or piece of wood down that is thick enough to hit the rails if it turns too much. Practice with the object being about 25mm away to start and bring it in closer as your skill develops. Face angle at impact is six times more important than path. The ball is influenced more by face angle than the direction of the putter head. Focus on good posture and using the up and down movement of your shoulders to control your putting stroke. Please visit www.justsinkit.com/instructions for free online video instruction.