transform / scale control of uvs when geo instancing?

So I’ve got my instances transforming / scaling as needed from the input chop.
However I want to have the same level of control over the uv’s that I have over the geo.
(translate and scale)

Is this specifically possible through touch’s geo instancing? I see the textureMode / replace / offset in the “instance 2” page but so far it seems like it can only offset, but not scale?

Am I missing anything or is this a task for custom glsl?
Thanks!