WIP6 blend surfaces History support .. failure case

In wip 6 also blend surfaces support History.

I tried to create a bellows tube exploiting this possibility in order to change the trend of the pipe without having to completely redo.
Obviously all transactions were made with RECORD HISTORY activated.

In the attached file, the bellows tube is composed of a polysurface repetition along a curve (101 pieces).
the repetitions have been connected to each other with blend surfaces.

When I edit the shape of the curve, through its control points, polysurfaces adapt to the new curve shape, the blends instead …some fits other disappear, much depends on how the shape of the curve changes.

wip6-tubospiralato.zip (12.2 MB)