Well some news:
I fixed the rattle. And I called UUC about the leak, they said I could either ship it back, OR get it priced to see how much it would cost, call them back, then get it fixed.
Am going to get it priced tomorrow, will probably have them do it Tuesday.
Now the leak is due to the fact that maybe 1/8 of the passenger side resonator isn't welded, so technically it will sound different/ how it's supposed to sound, once the leak is fixed.
My new hangers are coming Friday, so I'll do them either this weekend or let that guy do it...