Q2. I get liquid leaking when I charge the juice by pushing the BF juice bottle.
In order to make the inner space very narrow, the juice well of Femto-BF is made almost only for the wick (cotton). Therefore, it possibly gets leaked easily when you push the BF juice bottle as strong as you usually do for the other RDAs. Please push the BF bottle softly to make cotton gets wet with the e-juice.
Q3. I want to disassemble every part to wash up. How can I take the center bottom air hole from the black peek deck?
Please do not take it off. The center bottom air hole is press-fitted. It will hardly be fixed or in the worst case, will not be fixed if you take it off forcibly. This is really unfortunate but we will be unable to help you with this issue.
Q4. Why is the cap threaded instead of O-ring to fit with the deck?
We suppose that the ordinary caps of RDAs are set by o-rings which are easy for taking off and dripping ejuice smooth. The threaded cap is to be more concentrated on being prepared for the leaking risk because Femto-BF is less needed to be juice charged by dripping.
Q5. Do you have any setting recommendation for the best flavor?
The deck of Femto BF RDA is simple and suitable for any kinds of single coil setting including claptons. At this point, we would introduce the settings which are easy to make.