If you create your lines and arcs using the Associative 'Lines & Arcs Toolbar' and select the end points of curves to connect them together, if you edit them in the order that they were created they will update almost as if they were a '3D Sketch'.
John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA