I need some help with this device. I got this one from another fellow vaper here at the forum. Here is what I don't understand why is the needle so small it barely shows the tip thru the atty connection. Has anyone had any luck replacing the needle with a longer one that actually goes into the carto? I can barely get any juice into the carto and if I press the bottle too much to feel it up juice starts to come out the bottom of the carto. Thanks in advance for your help!