How to blend between joint blend-masks? (e.g. Full-Torso, to Upper-Torso, to Head-Only)

I am using UE 5.2 - the animBP seems to miss a node to blend between two bone-masks (like I could do in other engines). Duplicating layers (using it twice) is also not allowed.

Typical application: there is an aiming overlay layer, if the player is standing we want a bigger bone-mask, if the player is moving we only want the upper torso and blend gradually depending on speed - how?

Any suggestions?
Thank you! :slight_smile:

…alternatively being able to expose a pin from the layer-blend’s blend-mask array would help

related: when mirroring the animation in realtime with the pose-mirror node in animBP - the blend-mask is not - ideas?

also how to rename blend-masks?

I guess it’s in R&D https://portal.productboard.com/epicgames/1-unreal-engine-public-roadmap/c/1220-layering-and-blending-advancements