Because I chain vape, I find normal rta's (with out juice flow control) tend to produce dry hits very easily. The only rta's with JFC I've found that work for me are the Kayfuns - I have 2 Mini V3's and a Prime (clones). I've tried the Skyline but for some or other reason it didn't work for me so I sold it. I'm now on the lookout for something new that has JFC. Any recommendations please ? .