Using gaussian equatian to offset/pull curve

Hello, I’ve been trying to use the gaussian equation to “pull” on a curve. Even though I got the skript working it seems to be slightly off and I don’t know why. Would love for you to take a look. Thanks in advance.

Offset (16.6 KB)

I am sure there’s a smart explanation, which I don’t have, but this seems to work:

Offset (10.0 KB)

*A horizontal plane/frame on the parent curve also works:

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Thanks, this works great!