Garvin, that seems like a lot of acid in a marinade (vinegar, hot sauce and cola), especially overnight. I know that skirt is a tough cut, but did the texture get mushy before cooking? Just asking.
We've all travelled down the path you're on now. Some have had to travel further for their appointed destiny with their KK than you; so take heart. It's a right of passage around here.
One of the 2 or 3 Dizzy Pigs not currently in my pantry!
You had me a duck fat chips! I'm old school - cast iron skillet with about an inch of duck fat for my frites.
I'm liking the sangria part the best!
The chicken pockets sounds like a job for - dah tah dah - Transglutaminase Man!
http://www.modernistpantry.com/transglutaminase.html
Otherwise known as "Meat Glue."
GO FOR IT!!
Despite a lot of hype about how hard they are do to well, it's really not that hard if you follow Franklin's best advice - get the best quality cut of meat you can afford. I generally only do Prime grade anymore. So much better than Choice or even Angus. Haven't shelled out the coin for a Wagyu yet. I also follow his method of wrapping in pink butcher paper after the stall (around 170F) for the rest of the cook. Target IT is 203F. Wrap brisket (still in butcher paper) in AL foil and a beach towel, then into the cooler for at least an hour. You will be amazed!
I use them sometimes in the chimney to get a blazing fire going for grilling. I like these:
https://smile.amazon.com/Walden-Sure-Fire-Starters-Light/dp/B01C3KO7X0
Because, they are "Made with pride in the USA by adults with disabilities. We thank you!"