User blog comment:Mr.Robbo/On 'Superluminal Inductors'/@comment-4068313-20130315142516/@comment-5135903-20130317131427

You could, in theory, make a custom-shaped warp bubble to fit a spacecraft, but the arrangement of matter to do this would be exceedingly complicated (probably only possible for very advanced civilizations), and would probably be more unsafe (with a higher chance of the warp bubble 'collapsing' if something goes wrong); so it would be a lot easier to build the starship to fit the warp bubble, rather than build the warp bubble to fit the starship.

That is why the Superluminal Inductors are based on Marshall Barnes' claims, instead, because Barnes says that he has created the same effect using electromagnetic fields, which can be altered and shaped (through conductive surfaces, Faraday cages etc.) to fit a spacecraft. This gives me a better opportunity for creative output as to how starships would look.