Okay, I have come back with an update sooner than expected, and without having to make my wallet a couple grams lighter. I took cues from the video posted above in an earlier post, but added my own little twist, based on how I believe the design and dynamics of this tank work. As far as the original, plastic tank version, of the AGR, I followed what the gent in the video above did. Albeit, I added my own little twist that seems to work with the pyrex version as well.
I primed my Boge 45mm cartos a little bit, not as much as I normally would though. About 20-30 drops. You may want to use less if you are working with a 35mm, more near 20 drops. On to the twist... Instead of having a rag below like the video suggests, I just put my finger over the bottom of the 510 connection. By that, I mean the 510 connection of the locking device after it has been locked down onto the 510 connection of the carto. Fully assembled basically!
In my mind, I see the leak occurring because it is creating a "siphon" effect. Once that liquid starts heading down the 510 connection, the liquid just wants to keep travelling that way since it has already started, and it is the path of least resistance. By putting your finger over the 510 connection, the path of LEAST resistance now becomes the fill hole without the screw in it, as you tighten the main top down. I still progress slowly with the top going down, and kept everything the same as the video.
For the AGR+ tank, you pretty much have to use the fill hole to fill up your tank. I used an 18 gauge needle, and filled very slowly, almost as slow as liquid going through an 18 gauge will allow, just a little slower to be safe. We aren't trying to win a race or anything, right? I made sure to keep the needle up against the side of the fill hole, not going diagonal into the hole or anything, as to allow space for the air to flow past unhindered. I still used a finger over the 510 connection at the bottom. I also put the fill screw in (for both styles of tanks) very slowly, and with a finger over the connection. You can, almost imperceptibly, feel the pressure of air going against your finger as you do this. I believe this was the "sucking" force you would use with a siphon, but this was just working in the opposite direction, and that may be what causes the tanks to start leaking.
Anyway, I am no fluid dynamics major, or anything of the sort... But so far I have tried this with my Boge cartos I bought just for these tanks, and I did not even have to blow fluid out like the gentleman in the video did! They now work perfect, and I swear these tanks get me better hits and flavor than others I have used... That could be the Boge cartos though, as I normally use Ikenvape Platinums.. That will be my next test, with those monstrous laser punched holes they have. Originally I believed the leaking to be due to those large holes, and got the Boge's, but it happened with Boge's too... No longer with Boge's! I will update after I have had a chance to test those monsters out..
Sorry for the long winded post, but I try to be as descriptive and detailed as possible, so others may recreate the process! I sure hope this helps my fellow Vapers out with their AGR's, and maybe this could even be stickied for those having trouble with their AGR's someday. This post sure pointed me in the right direction to start off on my own experimenting! Good luck, and good vaping my comrades!