When a coil is created, you cannot go back and edit the sketch or its location. So if the feature the coil goes through is moved for a design change, the coil then needs to be moved, but it is a manual move.
- There is no way to "edit the sketch" of the coil and redefine its starting position.
- You can make it into a component, but workardouns have to be used to locate the center of the coil, by sketches.
- The coil feature should create and "axis" and a center start point automatically.
This will make the coils more robust and easy to work with.
Issue that I put into the forums (http://forums.autodesk.com/t5/design-and-documentation/editing-a-coil-sketch/m-p/5863088#M35520)