So, if anyone's interested, it wasn't too bad. You can get the key antenna (which assembles over the light ring) and the light ring off the ignition without having to remove the ignition which would require drilling/grinding off the security/shear screws. It just takes a tiny 5/16" box wrench to remove the small antenna bolt. The light ring is pretty fragile and it fits very tightly over the ignition...looks like somebody forced it, probably without lining it up precisely, fracturing it.