Can you describe how you enlarged the air holes? I'm having the same problem on my Sigeili 8
There were already some air holes in the Kanger base, where the 510 threading connects to the base. I took my smallest drill bit, which seems to be slightly larger than the holes in the base threading, and just drilled through, by hand, with the base sitting on my desk.

Did the same thing to the holes in the EGO to 510 adapter (on the large side which would face up when installed into the mod - be sure to remove the electric connection pin first so you don't drill thru it and have to rebuild it like I did. Oops!), same bit, same to the air holes in my Sentinal clone, and I drilled 2 new holes in the EGO threaded beauty cone as it did not have any slots cut into it (the cone that came with the Kanger protank).

I just got in a new solid brass cone to replace that one, and it has 2 slots in it's top, so I did not need to drill that out.
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