when I first built my rig I installed a 3 gallon Rotopax water container on the out side
now I find that there is no water in it, a wise sidecarist ( Hello 3legs
) once told me to roll the throttle on more at the apex and you'll really pull through the corners ( left hand in our case ) , the left hand wheel now tends to be skipping along the ground as I turn left, once I load the car up then it's no problem.
Adjustment by water is so easy, 70 pounds seems overly excessive, you need to get used to the feeling of "Flying " and ride with it.