Here's my problem:

I opened .nif files in nifscope (armor_0.nif, armor_1.nif, armor_f_0.nif, armor_f_1.nif) from one of the existing armors, and assigned a new texture to each of those. Then I save them in a different directory, using the same naming convention. In this case the armor gets adjusted to the actor's weight.

Now if I do the same and add a NiAlphaProperty to the NiTriShapeData in the .nif. The result is, that the armor does not get adjusted, it always displays as if the actor had weight 100.

What could cause this problem?

bumpIt is really strange, so far only one .nif based on the greybeardhat_0/1.nif with a different texture works correctly. Any clues?

Bumping again.

I really can not understand what is going wrong. I simply replace the texture in nifscope in the armor_0.nif and armor_1.nif, then save both to a new location.
I used the same method when I replaced textures in the greybeardhat_.nifs, but it still does not scale with the actor's weight

Update:
The scaling works perfectly as long as the female version of the ArmorAddon links to a vanilla .nif / remains unchanged. This is really strange

Update:
It seems that I have found the bug... I copied ArmorAddons from my mod. Copying a vanilla ArmorAddon and setting the meshes works. It is strange indeed, because the copy of an already modified ArmorAddon had all the settings as the copy of the vanilla ArmorAddon.

I hope this helps anyone else