sweep 2 rails

Hi to all,

I'm new here and I hope this is the right section to post this question.
I'm learnig GH by my self and I'm not able to solve this problem.

What I need: a definition to create a kind of ring by a given diameter and some shapes.

What I've done:
1. diameter definition: to find the final object diameter

2. rails definitions: from a initial rails and diameter definition I've find a scaling factor
in order to create the final rails with the same form of initial rails but with the wanted distance from the center.

I find the scaling factor using the ray and the distance of a projected point of initial rail to the plane XZ

3. shapes definitions: like the rails definition. I used more than one shape because sometimes I need particular forms along the path.

The sweep 2 rail component gives me a no good result

I tried the options inside the components in order to manipolate the data, but I don't found the solution.

If I bake the final rails and shapes, the sweep 2 rail in RH (selected object) works well, but in GH no (red object).

I attach the RH and GH files for all who can help me
Thanks

Filippo