How did you get on with the torque on the hub nut .. isn't it higher than most standard torque wrenches?
What I did was to use a long wrench, and calculate the torque using my weight(49.9kG) and length.
Touque = weight (kG) x G (m/s^2) x length (m)
When I stand on the right length, the nut will be tighten in right touque.
Had it tested serveral times, I can do the right torque within + - 5% error.
please be aware that G = 9.801