Take the stock coil out, pull the bottom contact and insulator, and yank out the coil.
Drill through the whole coil housing.
Drill out the air hole on the outside to 3mm.
Wrap what ever coil you want that will fit in the space, wick it with organic cotton, lube it with juice real good first, and you will be tasting your juice like you never did before and blowing clouds that surpass most RBAs and some drippers. Sub-ohm if you like, but watch out...when those rubber insulators melt they leave a taste in your mouth that Lysol won't get out!
But then again, it's all in what you want. Just cuz it trips my trigger doesn't mean it will float your boat.