OK, so I've gone and replaced the rotors. I brought them in to be turned and they were below spec. So after that fiasco I have new rotors on the hub, but not after some casualties. I accidentally nicked the ABS speed sensor ring when I was tapping out the hub from the rotor. The local dealership wants $106 (St. Charles is $87 but 4 days out). Would it be ok to tack weld this ring back together? I know the ABS is very sensitive but can I do that? And what about taking out the ABS fuse for the time being while I'm getting this ring replaced/fixed?

Here's the kicker, after all that work there is still the grinding problem, which makes me think that somehow it is coming from the rear axle, but I hope that I'm not this oblivous. I mean the front rotors were glazed and the front brake pads were wearing thin.

I've taken the day off of work today to try and take care of this. Any further suggestions?