Dual line component separation potential

When using push to create cylinder the program does not plot centre line right through as far as I am aware this would be where i would attempt to get perpendiculation from surface radially. This is how I would align the root curve to surface, previously mentioned, prior to extending each root curve geometry to cylinder surface(these lines would be blade centre line parallels.)
Planar orientation would be for blade pitch angle.
Move morphs, is there rotation ?
The variation in length of root curve to flat along blade is particularly difficult to plot individual geometries for material fill selection. And those geometrical flats do not tell a machine how to create smooth graduation.