Place the Vortex into the center of your grill and add in the charcoal. Open the bottom vents on your grill by 1/3.
Light a charcoal chimney full of charcoal. Alternatively you can fill your Vortex with charcoal and light them inside the unit.
Let the charcoal get fully ashed over then add to the Vortex.
If you want extra smoke flavor, place a small wood chunk or two over the center of the Vortex and let it ignite and smoke.
Place the wings into a large bowl. Spray lightly with the duck fat while tossing. Don't get them soaking wet, you're looking for a light coating. Think 'squirt squirt' and not 'fence painting'.
Add the chicken as shown in the picture above.
Close the grill and cook for 45 minutes. If you are using a large charcoal grill (22" or bigger) you might want to rotate the lid 90 degrees every 15 minutes. I haven't found this to be necessary on smaller (18" and 14") grills.
Transfer wings to a bowl and toss with your favorite seasoning and sauce as desired.
Notes
If you're saucing your wings with a refrigerated sauce, make sure you bring it to room temperature first or warm it over medium heat.