Hmm... not interested in doing the "minus the ring" mod? I did it, not pretty, but KFL+ Clone fits, suuuupppppeeerrr happy with the set up... Wasn't really feeling the iClear30xxx whatever it was.
Also note that the Panasonic NCR18650B are not rated as high drain from what I've seen on the specs, 2 amp continuous. I'd recommend the flat top NCR18650PD or PF as the battery of choice for the VTR with it's 5.5 amp limit; you get 2900 mah with 10 amp continuous 16 amp pulse rating and you don't lose much vape time as the two batteries have a similar usable mah above the cut off voltage of the VTR.