tri files and slider morphs for skeletons

[Macross.]

Sorry if this has been answered before, I've been looking but haven't found anything quite like my question so far.

I am attempting to find a way to use the racemenu/nioverride/bodyslide style tri based morph system to also change specific node locations inside a skeleton nif.

For example, making a slider to increase the width of the shoulders on the character mesh is limited by the location of the arm bone nodes in the skeleton; if you try to go too wide, the wrist/forearms become very deformed in order to match up with the hands. If I can create a .tri file for the skeleton.nif that they are connected to, I could also move the hands further apart to avoid this limitation.

 

I have found some older tri file editors and general resources, but they all relate to either LE files or only the headpart morphs, which use different file types than the SE nioverride system tri files I would like to work with.

 

Has anybody done something like this before, where should I be looking to learn more?

[Andy14]

Bones aren't meshes, so you can't create a tri-file either.
In Nioverride there are script functions for manipulating node positions. Take a look at the scripts.