Another 24 hours later... I left it at home while at work & now i've had a nice afternoon sleep & a cuppa, refilled the tank with my ry4 & well, it's quite a pleasant vape now. I'm torn between the the top caps, the intended one with the factory air holes (that came with it) is ok but the one i drilled out give a fuller vape with less effort. Whether anyone else would want to drill out their clone is up to them but having two at least i get the choice, no harm done. This is my first genny - proper, previously i tinkered with little things like the IGO-S. That explains some of my teething issues.