Rio Grande Margarita Recipe?

The Rio Grande in Boulder (and other locales) is notorious for their Margaritas. They are so good and strong they limit people three). This may be an urban legend, but a friend told me that a friend of hers "dumpster dove" in the Rio Grande's garbage many years ago to figure out which ingredients they used in their margaritas. He found many bottles of these ingredients and then took some drinks home and reverse-engineered it. I've since heard they swear there is no apple juice in them. But, whether it's true or not, it tastes like their margs and packs a kick.

Parts Ingredient

3 Jose Cuervo Gold Tequilla

1 Juarez Triple Sec

3 Duffy's Lime Juice (Rose's OK too - they used one called Beiches, but it apparently was bought by Duffy's)

1 Water

2 Apple Juice (the clear kind)