How do i use upper and normal default slots

[Simolitical (SimonTBG)]

I have montages that need default and upper body slots and i dont know how to mix them
This is how my anim graph is layed out:

With main state inside is:

Dont mind the names but how will i be able to do this

[Euan_Carmichael]

The usual setup for this would be to use a LayeredBlendPerBone node to allow you to apply the transforms that come from the upper body slot node onto the upper body bones. The Lyra sample project has a good example of that in ABP_Mannequin_Base:

So here you’re mixing the upper body montage data with the lower body from the rest of the anim graph.
Then later in the graph we have a slot node that applies the full body montage data to the entire skeleton. This will override everything prior to it in the graph:

[Simolitical (SimonTBG)]

Thanks this is the final code that i came up with which works fine for me: