Why is there not a variable resistor adapter for the atomizers.... say you have a 6v device already... why not just build a 510 connection varible resitor. simple effective, and stop you from having to dish out more cash to replace a perfectly fine HV tube style. anyway.. resistive material such as old prodigy switch, and three piece 510-510 connecter with resistive center piece. just a thought. small cheap and effective.