Tree fiddy: The mop is composed of cider vinegar, beef broth, peanut oil, garlic powder, chile powder, paprika, dry mustard, ground bay leaf, Tabasco, and Lea & Perrins. Very thin consistency; I could probably spray it on and may try that next time to reduce loss of the rub. My opinion is that the vinegar helps to dissolve the fat.
My rub is 2 parts each black pepper and paprika, 1 part salt. All that is followed by a table sauce that takes me back to the 1950's-I got the recipes from Linda West Eckhardt's The Only Texas Cookbook. Key ingredients there are the dry mustard and vinegar. The result has plenty of whang. Also works on country style pork ribs barbecued 'cowboy style' on raft trips.
I use the water pan as a heat sink, actually have a sheet pan beneath the meat which is on a roasting rack. May have some liquid smoke somewhere in the back of the pantry, but I can't remember when I may have used it.
I don't have a sous vide, but I got one for my son for Christmas last year.