It is said that the teacher learns more than the student. That certainly is true for me: in this case and in many others.
I must have had tunnel vision during the past couple months, because I was unfamiliar with 510 cartomizers until preparing to answer your question.
I now have conducted some research and may almost have caught up to you on this. Although you have found that video at least once, whereas I can't find it at all. I can tell you the following:
- VaporKings is the only supplier I know of who offers blank (what you call "dry") 510 cartomizers. Rob specifies that these are not made by joyetech but will work with Joye 510 and eGO/Tornado batteries and 510 adapters. They have a capacity of 28-30 drops of e-liquid and are 2.7 Ohms resistance.
- I've read differing opinions on which end to insert into the condom when using Dogbody's Carto Cap Filler Method. If I were to do it, I'd start by trying it from the battery end.
- Many videos of this method (using Kr8 carts) can be found on YouTube by searching there for "cartomizer condom", "CCFM", or "carto cap" (quotes not needed). I like Doctor Vapor's presentation the best:
Although I wasn't able to find that particular video for you, I hope this helps. Thanks again for teaching the teacher, Warrior!