Hi Rolf - one tool to add to your arsenal is HBar - you can use that with the Perp Osnap to move a curve to intersect another- the problem may be that it moves another part of the curve more than is acceptable - it has to work with the existing control points. You can also make a ‘live’ network of curves by setting up something like in the attached file - I don’t know how often it would be worth the effort, but perhaps- point-edit the blue curves to update the network. The black curves are CurveThroughPt on points which are intersections of the blue curves and a set of planes. All with History.
CurveGrid.3dm (112.6 KB)
-Pascal