I have found the problem with rear sheeting on a one sail, one man boat that when you are sheeting hard while on the wind the effort pulls your weight back on the boat. Exactly what you do not want. Now, if you have a cleat this might be lessened but CA seems to prefer no cleat so maybe he just wants his weight balanced when pumping the sheet. woosy booms used for rear sheeting must be strengthened for mid sheeting or it's goodnight nurse.