It's gonna be a massive pot of beef stew, dammit!
On a good note. I went to my church (at 1:30AM). Binding post idea didn't work for the input from the mixer on the amp (<- @Remeniz), but I did cut the extra length off the cable (down to about 25ft now) and reconnected the RCAs...got rid of the buzzing for church in the morning.
Did my sound check with my guitar: sounded great.
Did sound check with video on laptop for tomorrow: sounded perfect.
Did mic check again. Still a ringing when you say "s" or "sh" sounds at the end of words, but other than that diction was clear.
I need that after the week I've had.