Thanks for the response.
1) to be honest, I have never used a torque wrench for this, always just did it by feel, taking the centre bolt to a pressure that felt right to me, about 3/4 what i would a wheel bolt on my car.
That's what I ended up doing.
i use cotton based rope in the cylinder, supported by a bar in the hole on the side of a powertorque boss.
I tried the rope in the cylinder trick to no avail. Maybe I didn't use enough rope. The boss on my mower does not have a hole - at least, I cannot find one.
Often they wont move by hand, thats ok, they will give if they need to.
Are you saying that you do use a torque wrench for the blade nuts?
Thanks
Ken