I don't know, my hits are pretty dry from start to finish with the bloog so far, and when I turn up the voltage past 4.2 it burns. I think it might improve if the hole was lower but I haven't gotten a satisfying hit yet, really, even with a fresh carto.
I wonder why they taste dry even with a fresh carto where the position of the hole doesn't matter initially. And they burn past 4.2V? Wow, that doesn't sound good. What's the ohm rating?
What you are saying about the IKV makes sense from what I've read elsewhere. I think they are rebranded SLB cartos. The filler is supposed to be a completely different material that is super absorbent. It got good reviews EXCEPT that supposedly the good times lasted for only a few refills as the filler would apparently expand and squeeze the airhole closed.
I know that was the issue with the original Gold (V1). They seemed to have way too much filler and very tightly wrapped. It would take a long time for the liquid to go through. The V2 is completely different. Maybe it has the same tube and threads but internals seem nothing alike. I've put one through vaping close to 15 ml of juice (yes I'm vaping way more now