Juice enough limes to make 1 cup, about 10 limes.    Reserve 5 limes and discard the rest. 

To make the simple syrup,  add equal parts of granulated sugar and water to a small sauce pot and add the reserved limes.   Cook over medium heat until the sugar dissolved.  Allow to cool at room temperature before handling.   Pour the syrup over a sieve into a Pyrex measuring cup.   Press the limes against the sieve to release any extra syrup.  

Add the tequila, orange liquor, fresh lime and lime infused simple syrup to a 1 liter carafe.  Chill a few hours before serving. If not serving over ice or shaking with ice, add some water as most drinks are diluted with a little water.  

Run a lime wedge around the glass, dip the glass in fine sea salt or tajin seasoning and garnish with a slice of fresh lime.