How do I create an RTS style mouse pan with a zoom that centres to the mouse position?

This is as far as I got - https://drive.google.com/file/d/1j3wtpg_sEIcpActmNIZrLObUGvA6bm92/view?usp=sharing

Ideally I am looking for something where the middle mouse scroll zooms to the mouse cursor position smoothly like an RTS or 4X (not the current scroll position). Also you may notice that the panning doesn't happen at the same rate at different zoom levels like it does in the Touch: Zooming example in C3.

I've had a look around the forums but still the closest thing I've found is the Construct 3 Touch: Zooming example. Does anyone have anything similar to this or even a tutorial link?

Thanks.