Grimm,
Ben did mention needing to drill a hole "near the threads", but it wasn't clear as to whether he was talking about on the Nebula atomizer cartridge, or on a 901 battery. And since there is nowhere "near the threads" that a 901 battery can be drilled (nor any conceivable reason), I had assumed that he meant near the threads on the Nebula atomizer cartridge. For, the hole on the 901 atomizers is indeed near the threads. Nevertheless, if the drilling needs to be done on a 901 battery, then the only conceivable place for a hole to be drilled would be right into and/or through the threads themselves. This would admittedly be a tad more difficult than drilling a hole in the atomizer body, but at least you would need to only do it once per battery, rather than once per atomizer. Either way, it was certainly fair to point out this drilling requirement; so, thanks for the clarification.