The iClear-30S is, similarly, a tank that has NO center air tube.
The reason I still have a couple 30S's in my rotation is that the 10-15 seconds it takes to pour the ejuice into a small bottle (with a screw-on drip tip) before changing the coil...is easily exceeded by the time saved in refilling...5-10 seconds to screw/unscrew the TOP (and NO need to remove the tank from the Mod to refill).
Course...that's just me...
yepper, agree with ya (but I never got along with those tanks)
I could care less about filling any tank, just all too simple - IMO
topic kinda got warp'd into I made a bad tank haha
my point was a slip in, High Performance bottom coil
that was re-buildable, now that might be cool...
if the Endura coil was re-buildable, now that would be a smash in my book...