Don's Perfect Frozen Margarita

1 x 11oz can of Bacardi frozen margarita mix
1 x 6oz can of frozen limeade (or half of a 12 oz can)
Approx. 12 oz Jose Cuervo tequila (use the empty margarita mix can to measure)

Put all contents in a large blender. Blend and keep adding ice until contents are slushy. Serve immediately. Or, freeze the mixture for later. Remove from freezer 30 minutes before ready to serve.