Hallo, Often when I start the profile-tool, half way through the process I notice "Surface-Normal may be better"; Or afterwards I notice I need an other guide-curve than the first selected, etc. ... And than I have to restart the tool all from the beginning, because the Construction-History of the tool could not handle such changes. I think it could be useful to also change options after surfaces are created. i.e. -Add / remove curves from profiles and rail -Add / remove guide-curves and surfaces -Changes in the profile-orientation Kind regarts, David
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