so I recently picked up a Stillare clone at my local shop. I'm new to rda's so I bought it because it was cheap. Only $18. I love this thing with a 28g .6 dual coil build! I really want to try a single coil build but there is only a dual air hole option. What's the best method for drilling out a 3rd hole on one of these bad boys?? Any help would be greatly appreciated!