Erm, No.
A VCU never turns freely - unless its been frigged.
Erm , No.
Testing on a car with 5kg and 1.2m bar is not pointless - absolutely far from it. You, yourself, publish why...
3.0 kg . . . . . . . 80.0 seconds
4.1 kg . . . . . . . 49.5 seconds
5.0 kg . . . . . . . 35.5 seconds
6.2...