@Tbev-Agree on the "M" shaped wick build vs the "U" shape. Slightly M shape gives a bit more cotton for the coil to draw from without have to move fluid while vaping like the U shape does, works much better. At .6 ohms I get no dry hits once I added a touch more cotton and only half filled the vertical portion of the channel. That is doing usually 5-7 back to back pulls about 4-5 seconds long with a minute or two rest between cycles.
Someone requested some pics vs a KFL:

Fv4 in action photobombing

vape Pron:

Size Reference:

Someone requested some pics vs a KFL:

Fv4 in action photobombing

vape Pron:

Size Reference:

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