Slingshot Problems-Need Help !

Hey everybody,
I need help:
For my actual coaster Slingshot I tried to build a curve-to-curve-heartline-roll with newton 2 but it doesn't work.Is there someone
who can help me (I've got the same problems with corkscrews)[V]?

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Here are 2 pics of the curve to curve heartline roll on MacChiatos
Hatari.

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