Single Input to select both X and Y variable inputs?

Re: 1: Correct, in this structure, a user is explicitly clicking one of 100 different groups. The roundness just gives a bit of style to it.

Re: 2 I created a video intro in another thread.

Re: 3: you can reference the custom state’s value in a workflow when you’re creating or updating a thing in the database. Because you’re referencing the thing “Number”, you can pull out the ascribed X and Y values.