There arm numerous aids some recommended on the site that establish a tight connection of the left arm and shoulder at address. Some of them keep the elbows close together and inside the hips. This appears to help rotate the spine when using a hand controlled pivot and keep the shaft on plane. Jimmy Ballard teaching program is fundametally establihing that position at address and maintaining the triangle through out the swing. Are these aids (figure etc. just to give a feel or should there be a degree of pressure between the left arm and shoulder so that any movement of the arm turns the spine and the elbows in close to each other? Finally isn't this pressure point number 4 in TGM terms?