An update,
I was going to wait till i got a 3s lipo as that seemed necessary to run the vulcan as i currently only have 2s lipos on hand.
Then i saw this video from walcoms7.
It shows a vulcan running fine off a 3s lipo, it also has an afterburner installed to improve range (albeit a stock stryfe cage, wheels but with some sort of 130 motors they don't specify).
I am planning on going with the upgraded spring route as finding stryfe's down under is impossible.
That said should the spring upgrade not perform as hoped I may get a cheap aftermarket cage and install and afterburner that way.
It may be a few months till i get all the bits to get this working so this should have answered your question, good luck with your mod.