#361 Errors in Align to principal axis

[Paco Escarpa]

Major axis alignment unexpected results

Take a elongated object (say, stand-up human-like sculpture) , randomly oriented on space (less than 45º in vertical, in this sample).

Use filter Normals, curvatures, orientation -> Transform: Align to principal axis

The mesh is moved to close vertical, as expected, but

a) normals are inverted
b) Second-long axis is .. inverted too (left-to-right, in this sample).

¿Any idea?