I just cut the end off that has the small hole, making it just a tube. Threw away the cart and drip right down the tube. Two drops gives a nice amount, about equal to an anolog and clouds of vapor. I use it as my main vape now, my poor old 510's only get used when she gets to hot. I alternate usually between it and my 4081 box mod, the 401 being a little better as I can feel the heat in the vapor more.You lost me at that part, cut the top off of what, where? I would like to learn more of this.
I have a couple of dead 510 attys if anyone wants to trade for a couple of dead 401's. They make excellent connectors for each other on mods.