Flow on crv starting point

Hey all!

I’m using Flow to flow a curve around another curve, but I would like to know if there is a way to change where on the target curve the flow begins from. Source crv is straight (i’m trying to get a variable offset), and the target is a closed irregular round shape. Planar.

Thanks!

CrvSeam to adjust the start/end of a closed curve.
CrvSeam | Rhino 3-D modeling (mcneel.com)