Scaling an armour in Nifskope

[Espar]

I'm trying to downscale separate bones of an armour in nifskope using the "scale" option,

putting in a value and then hititng the apply button.

 

But I can't get my changes to work in-game, the armour itself is a TBBP armour so it may be depending on the skeleton file I have installed.

I tried to see what would happen when I rename the skeleton file but it just caused a CTD on load.

 

Does anyone have any tips on how this is done?