Finding center of mulitple curves

Hi there, i'm creating a workflow in which you select all the geometry and flatten everything (well this part works fine) but now i want to find the center of this geometry and move that to point 0,0,0.

I'm only not able to create a single center point for all the curves. (because this centerpoint will move to the point at 0,0,0.

I've tried to use a bounding box with union box. But that doesn't seem to work with me. Using an area component finds the center of all the curves instead of a combined point from all the curves.

I would like some suggestions :) Thanks in advance!

best,

Remy

Flatten%20all%20geometry.3dm

Flatten%20all%20geometry.gh