Thanks for the comments. The cider vinegar was always my default go to on my water smoker. On my ECB, I used random different liquids in the water pan to test.
My favorite was using my daughter's kool aid (I had been drinking and it sounded like a good idea). Those ribs had an awesome Island Berry Blue flavor!
I think this gravy turned out as well as it did because I made a roux with the drippings.
Whiskey makes everything better.