In hindsight, some of the troubles can be from user error.
I tossed out the first one. On number two. Used a syringe this time with a needle, way less gurgle. While it seems feasible to fill down the side using a regular dropper or dropper tip, apparently liquid has the potential to get down into the straw, so use the syringe and put the syringe about half way down the side before beginning to fill.
It is apparent though that my first try on the first one had a leak because even before I put a drip tip on it, the liquid quickly disappeared from the top of the tube where with number two, it still appears full and the level is not going down.
I am also wondering about something. Put a drip tip on the first one. Yes, you have to get the straw dead center into the hole of the tip, if not, any slight pushing could possibly knock the straw loose.
G4 number two had the straw slightly off center so I opted not to get the drip tip in and used the rubber stopper.
So basically some of the troubles can be related to user error but I want to be able to use a drip tip!
I am also wondering if type of liquid plays a factor. First liquid I used is a very thin liquid. I opted for a slightly thicker not not super thick liquid on the second try. My tube is still full.
However, now that it has sat a few minutes in between puffs, I am getting the gurgle back so while I thought it was all me, it is not.
I blew it out, decent hit again. When it hits right, it is actually a likable accessory but when it acts up, not so much. What I also notice is condensation in the straw and wonder if that isn't part of the problem with the gurgle.
I will also add that I am vaping mine on a five volt device.
I desperately would like these to work well. I will say that the ease of use, even with having to use a syringe is far better than the clearomizers and the concept is spot on but here it is about fifteen minutes from when I started the original post, my mod has been sitting in an upright position the whole time and yep, right back to it being flooded. I just blew it out, wiped out my connector etc for the third time and it is back to hitting nicely.
I am looking forward to the manufacturer doing some type of revision on these things. I will definitely give them another whirl once that happens.
I am sending one of these out to two different people to try too.
ETA, on the glue thing. If you start to chain vape it, the bottom gets warm. We all know what happens with certain glues and silicons if heated, it reverses the process and might be cause for the base loosing and leaking. For now I would recommend to users to allow it to fully cool down and sit for a while before removing it from the connector as the twisting would loosen the warm sealant from the base causing even worse leaking.
I probably have given way more than my two cents. But I do hope it will lead to some fine tuning of a product that seems to have great potential.