If I'm not mistaken, the immunity to normal weapons doe snot affect the adjusted power of the weapon. So a force 4 City Spirit would just shrug off an 8M sword thrust, but would have to roll dice if you dikoted the sword, increasing the power to 10M. It's not much, but it is a bit. Also, doesn't this apply to burst-fire and full-automatic wepons fire? A 9M gun firing on Burst would jump to a 12S (I think, I haven't had any coffe yet) thus, leaving the City Spirit to roll against a 4S wound. Again, please correct me if I'm wrong here.
Gabriel