If you have spirals(clothoids) in an axis and want to replace them with other spirals afterwards, you can only do this by deleting the existing spirals as a sub-object and reinserting them with a new criterion.
However, if the project is in an advanced stage and you have, for example, already calculated cross profile lines and cross slopes, then you have to re-construct everything again from the point at which you deleted the sub-object from the axis. This means that the cross profile lines and cross slopes are deleted from the axis by deleting the sub-object from the further stationing.
This behaviour should definitely be changed, so that a combination of e.g. spiral-arc-straight-arc-spiral is simply replaced by a combination of spirals spiral-arc-spiral and does not have to be deleted before.
