Flew from baltimore-philly-italy and back the same way last week. Not even a second thought or look. I had my batteries in a separate bag in my carry on with the terminals taped with masking tape (just being extra careful). 4 30ml bottles of liquid in a quart bag. 1 ego case loaded with empty tanks and some rda's (my wife vapes too so we had a lot), and another ego case with SID, 2 zmaxes, 2 itastes, and a couple twists.
I thought for sure the bag would get searched with so much stuff in it. Not even a blink leaving the country. Got searched coming home in Italy and again in secondary security in Philly. The funny thing was Italy searched us because they saw liquid or gel on the scanner. It was a bottle of pesto for our focaccia lunch on the return flight (they let us keep it). The second time in philly was because of a "large crystal" that showed on the scanner. It was an award my wife won from her company while on the trip (company paid trip). It was a giant crystal diamond the size of a tennis ball. So, not one peep about piles of vape gear but pesto and a fake diamond got us searched. LOL.
Tanks will leak. I had one small ptank2 with 1ml in it and it leaked in my ego case. I came home with completely empty tanks.