Planarizing a curve
Once working with multiple Curves: you can Right click on the component's icon and choose "ForAll" option to Planarize all curves Based on the same Plane.
Below it, You can find two different options to define this single plane ( Base on first/ Average)

Inputs

Name	ID	Description	Type
Curve	C	Curve to planarize	Curve

Outputs

Name	ID	Description	Type
Planar curve	C	Planarized Curve	Curve
Plane	P	Nearest plane to the curve	Plane
Deviation	D	Maximum deviation	Number