WebGL / Three.js Body Morph Implementation with Sliders

I'm looking to create a WebGL/[login to view URL] implementation of a PCA model that we've generated to morph the model to be larger/smaller for a specified set of vertices being linearly transformed/morphed using sliders, very similar to what this example implementation does: [login to view URL] This example uses bones and a "morph model", but that isn't how we want to apply our changes -- we want to apply changes based on a known set of linear transforms based on the vertex's index and a defined additive/subtractive value (to be multiplied by the scalar you're getting from the slider) for that specific index. The base model we'd be using is already known, and the transform values (addition/subtraction of values to [X,Y,Z] coordinates based on slider value change) are known as well (linear transform). I hope the above is descriptive enough - if it is not, please feel free to reach out to me via a private message. I'm hoping this is a relatively simple implementation for someone who has [login to view URL] experience and works with 3D models/WebGL regularly. The deliverable for this will be a lightweight Three.js-based HTML/CSS/Javascript package that we can run locally. The deliverable *must be your own work* and *must be usable commercially without purchasing any additional licenses* (e.g. please just use [login to view URL] in its bare form and do not use anyone else's functions unless you can link to their license and it is acceptable for commercial use). I look forward to working with you :)