Is there a node(s) that can plot cylindrical/polar coordinates using: Radius(t), Angle(t) and z(t), instead of the Point-node which maps Cartesian x(t), y(t), z(t) coordinates?

I managed to create a Variable Pitch - Variable Radius (vP-vR) Helix NE macro attached here
Thanks to Brian’s instruction pdf and his VarPitchHelixExtremes.js script.

Having difficulties Flowing a custom Helix over another custom Helix.
(Red line is the minor helix)

Can only Flow the MoI Factory Helix-Node onto another Helix.
(Red line is the minor helix

I am hoping that using cylindrical coordinates to describe the Minor vP-vR Helix will make it easier to ‘Flow’ it over another Helix? As there would be a centre reference for the axis to follow.

Any other suggestions are welcome.