Adjusting the height of the trace: The Writer script always puts its dots at a fixed Ytran with respect to the item named Paper. I could have inserted a height-adjust slider, but that would require many tries to get the result right. (The adjustment would be "blind" at that stage.) Best way is the good old Carrier trick. Set up your actual paper surface as a child of a simple Box prop, and name the box "paper". Then the Writer script will parent its dots to the platform at its standard height, and you can slide the real surface up or down until the trace looks right. This will be especially important if your real surface has some thickness.

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