With the AF wide open the AFC ring comes off if you give it only just another half turn so you need to be careful with that, as it sits on there fairly loosely at that wide open setting. Also with the AF wide open, even though it is a tiny little bit airier than semi-restrictive, it is still probably just a little bit too restrictive if you, like me, prefer to have the AF about 2/3 of the way open with most 24mm and 25mm RDAs when taking 2-3 second drags at above 100 watts for a moderately warm-ish, dense, fairly cloudy kind of vape (i.e. the type of loosely restrictive that is right smack in the middle between semi-restrictive and un-restrictive). But like I previously said, with coils bigger than 2.5mm ID it is most certainly too restrictive (and turbulent also in addition to that), due to the space around the coils being too limited for it to properly accomodate them. Either way, IME the OG Reload performs best with coils at just 2.5mm ID also so, just something to be aware of, just in case you thought the fact it is a 26mm RTA does imply that using 3mm ID coils will be without issues. It doesn't. With 2.5mm ID coils the AF is very smooth, though. Just that, with this RTA, I'd be taking 4 second drags at only medium-high wattage, which isn't true high wattage vaping so it doesn't quite meet my personal vaping style or preference.
