Perhaps this should have been an assembly?

This should be an airfoil with support/mounting webs at the end.  My intention was to extrude the airfoil 100mm and the webs only 2mm. My problem is that whatever I extrude first, everything else disappears.  There seems to be no way the extrude and the return to the sketch.  Should I be thinking of a different strategy like saving multiple copies, extruding each part separately and then joining the parts together?

 

Edu SOLIDWORKS