I drilled mine out recently to 5/64 using a hand drill with a slow speed and Cobalt drill bit after using two cheap ones (what I can only imagine wood drill bits) that broke on me about half way through the drilling process and used some WD40 as a lubricant. I also heard that Coca Cola works pretty well as a lubricant as well when drilling out air holes but I have yet to try it out. It vapes very well now and I can now use it again in my daily rotation if my trident clone decides to break on me again. It's rocking a single 0.6 ohm 24 gauge microcoil right now and it produces great flavor, although it does tend to heat up the whole unit quite warm if I chain vape it. IMO good quality flavor can still be generated depending on the wire you are using in your build and if you have it wicked properly. I am getting better flavor and bigger clouds, despite not being a cloud chaser, now than I was before and it doesn't feel like I'm trying to suck a golf ball through a coffee straw anymore I just prefer a more airy draw on my devices.