I have been using a 2.5 LR/HV Cannon for the past 3 days with no issues other than fantastic vapor production and taste. My first IkenV atty, and I luv it! I'm actually putting in about 3-4 drops at a time, and have not experienced any leakage or gurgling at all. Using it on a 5V GLV2 mod. Blows away any other 510 atty to date. This is the one I'm using:
IKV LR/HV 2.5 . Isaac also sent me a 2.5 regular 510 to try, but this Cannon atty is unreal! Primed it with about 8 drops, waited about 5 minutes...vaped a bit...topped with another 5 drops, then all was good. With other atty's, always had leakage of some sort. Not sure if Isaac sells them, but a sealed adapter will act as a juice "catch-cup" if you're experiencing leaking. I'm using a 510-510 that I got awhile ago from another vendor.