Alleycat, at this point I don't know if anyone can truly answer your question except Jon or Dino. As I understand it, there was a change made to the Lavatanks that were in last nights sale. I can't swear to it but I believe the flange on the bottom cap is thicker. I know Dino said last night that the tubes from the earlier batches would not work on this batch.
Several of my Lavatanks do have a little of the carto sticking out the bottom. I'm hoping that the flange will not be much thicker and that my JB Bedazzle tube will work just fine. I'll know for sure in about a week or so.