Yeah, loosing strength in the hands is another thing that sucks about growing old. I have a small block of oak about 1" wide that I have put between the pulleys on the torque driver near the shaft. Seems like when I take both hands, squeeze and twist, it opens up and I am able to hold with one hand and place the block with the other.
Slip the belt between the pulleys on the torque driver, and then work the belt over the variator shaft. Reinstall the variator parts and you should be good to go.