Are there links to these types of demonstrations?
There are a lot of videos on youtube Dr. Vapor did a whole series of them on cartomizers that are good.
I prefer autos too but I had to give them up, except for work, when I started DIY and filling myself, because I did kill batteries by overfilling. Liquid in autos will kill them (of course I just had an ego manual button stick and kill it also -but it is rarer).
For work I fill my cartomizers the night before - and after letting them sit a while -
clean the connections and then I take a few puffs on each with my manual passthrough before packing them up - just to be sure there are no drips left that will get down into my autos.
I resent the it when people quote a single item like battery prices and put on a superior act and say you are saving money with vaping. Not living in NY or CA I never met one person who saved money by vaping. Between batteries, mods, passthroughs, atomizers, cartomizers, carts, chargers,adapters, nic-juice, e-juice, flavorings, sweeteners, vg, pg, bottles, organizers etc, etc - I have spent more then 5 times as much in the 4 months since I have quite smoking then I ever did in the same time frame as a smoker, and have never met a vaper yet that has saved anything. Oh, I know it is possible, buy one decent kit with a guarantee, and carts, stick with one flavor e-juice, fill yourself - I just never met anyone who was that disciplined with all of our new toys and flavors offered,