First I want to know that it's your fault I'm not doing the boring stuff I'm supposed to be doing. You forced me to stop doing that and play with new shiny
AFC ring is loose by your description of the Giant, but firm enough that it's not going to move on its own. As a test I got my hands wet (water) and had a lot of trouble moving it, but no problem with dry hands. I can see it moving if you grabbed it out of your pocket or bag (or fanny pack) by the AFC ring, but not in normal use.
With the stock 2.0 ohm coils on a mech with a 4.0 volt battery the taste/vapor was adequate, no more. On a SID at 11-12 watts the flavor was great and the vapor production was well above what I was expecting. Getting the lower resistance coils or kicking it would make it wonderful on a mech. I am also thinking of rebuilding the older style coils into a 2.4mm diameter single compressed coil with cotton/rayon to see how that works, but that's a future thing.
In short: my drippers have nothing to worry about, but the Kayfuns are getting nervous.