No probs, glad it works for you too.
Once you do it this way a couple of times, you get the feel for how much liquid the carto will take, I stop as soon as I detect slight vapor drop, then refill with about 1/3-1/2 of a capfull. A new carto should take about 2/3-1 capfull. (the first one in the vid was a top-up, the second was a new empty carto.)
Also I am using 100%VG in the vid, the first time I tried it using 100%PG it took a whole capfull and a little bit more!
When I am using cartos I am on the run and have my PCC with me, so I take the empty one off, remove the cap of the new one and squirt some liquid in it then push the old cart into it, cap the other end and put it in the PCC. This way it has time to soak in, and both spare carts are always topped off ready to go.
Lets call it the "CCFM" -Carto Cap Filler Method.
This was just a quick vid to see if anyone else had a how-to of this way, I might make a better quality one that is clearer, quicker and more precise.