Have you tried IKV HV 3.5 ? these atomizers worked flawlessly in conjunction with the RES for me. Unfortunately I can not afford to have multiple mods at a time so when I wanted to try another mod I traded my Alpha...but when I had it...Ikens 510's are all I used and loved the Alpha.
I currently use an 80/20 vg,pg mix and no matter what I do I cannot seem to get it to work. I have used all kinds of attys and the results are the same I have tried all manner of drawing techniques and still the same. With regard the gurgle it is defo overfilled as it becomes extremely hard to draw and will either flood the atty of leak out of the air intake holes(I did this intentionally as I was concerned that it wasnt full and wanted to establish a limit). I appreciate that with all high end mods there is a learning curve but this is ridiculous I shouldn't have to spend all my time fighting this thing to get maybe 1 decent hit. I honestly think that my unit is defective.