A7 is a great design with bottom airflow, only issue is there is alot of unused headroom above the build. It works well enough. It's a tall one. Great design, but would love to be able to mill the top down (threaded).In addition to the Magma, what are some atomizers that pass the air from below the wick/coil assembly?
I use a pre-RM3 (A6). I pulled the center pin and insulator and ripped one side of the Delrin insulator with a Dremel cut-off wheel. The insulator is solid enough that I don't see the positive pin touching the inside of the deck for any reason. Liquid feeds to the deck by passing up the side of the center pin.
If you have a sealed rda that you want to convert to BF, it is possible to do so without a drill press. Just press the pin and insulator. Cut a narrow slit up the side and replace parts.

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