I finally got around to trying this today.
My new method for refilling is the rubber cap method (CCFM), like so:
YouTube - Refill Ecig Cartos Quick and Easy (CCFM)
I love this method! It's super-fast & easy (just like how I like my women

). The problem with it is that the carts seemed to only get about half full. The liquid starts to appear at the top hole (battery side), then I would stop and set the cart battery end down on a paper towel and let the liquid soak into the batting inside the cart.
With Taryn's method, when I see the liquid start to come out the top hole I stop, wipe off the ends, stick in a .... plug, and drop it into a battery bag. Grab the strings and spin it around for a few seconds, then take it out and repeat the filling method. I get at least twice as much juice by implementing Taryn's method. It's quick & easy and the carts are ready to vape... no waiting!
Thanks Taryn!
I would highly recommend you all to try the CCFM too. Works great for me!