I've tried one 300, and two 400s. The first 400 had a center draw hole, and the last was as tight as I could roll it.
I ordered the Pyrex tubes so I could try the scubabatdan wick, so I wouldn't have to oxidize the mesh.
Hey shoog, don't feel bad, or incompetent... I own several different SS wick genies and I can't get any of them to work without tasting like brake burn on a tractor trailer running on a 6% downhill grade. I am going to take the genie rba class during VApeFest NY. If I can't get it right after that I am giving up... And I've already given up on them about 6 times already!
For me there is still nothing that can beat a silica dripper.