For quadrant (I = one) unwrapped blended pre-helix-wrap curve, default wrap is a Left Handed helix beginning at (0, -r, 0).
So to match pre-unwrapped helix, Reverse Twist checkbox may be used,
and a rotation to match the actual start point of the initial helix may be needed.
Adding an initial selection of the start point of the initial helix could be added to the script, to determine needed matching rotation.

Missing semicolon located.
radius = 0, division by zero possibility does not seem to hurt(?)

- Brian