When you get the Reo a couple of things to do before your start
vaping.
Apply noalox to the firing pin and top of the spring. The firing pin is the gold color positive contact. With the door off press the button and you'll see it bend down and come out of the black delrin insert inside the Reo. Look for this little bottle that will come with the Reo, it is the noalox.
Next you'll want to cut an inverted V in the tube that is inside the bottle. This will keep it from suctioning to the bottle. I've found a sharp paring knife works great to cut the tube.
the
rba (re-buildable atomizer) your going to get will come with an o-ring, this goes on top of the Reo around the 510 connection so it will be trapped between the reo and the
rba when the RBA gets screwed on.