we are testing v3 as we speak, and yes the innard itslef is 100% replacable, its being tested for leaks and gurgling.
when the coil pops, plop in a new innard, no need for bottom screw portion.
V1 and V2 bottoms will hopefully ship out in a day or so as well, its a limited release for v1 and v2 innards, they re ran the run just to make these and then shut it off to move onto the new runs of version 3.