From Perception Neuron, Scaling Transform of a Single Bone Via Blueprints

I’m running into a problem with animation from a plugin for the Perception Neuron motion capture system.

I’m using a model that’s shorter than the mocap actor’s body. The skeleton scales correctly and the bone rotation is all okay. However, the translation from the base bone is driven by the Pelvis bone. The problem is that the shorter model moves too much in relation to its size. For example, when the actor sits down, the model sinks through the floor.

I want to scale the translation proportional to the difference in size between the model and the actor. However, I can’t find the procedure for doing this in an animation blueprint. Has anyone else done this before?