READ THIS INFORMATION ABOUT THELEMA
The Thelema is a good product, but the design is slightly off. Too much leaking, BUT that can a fixed with slight alteration. You need to use teflon tape on the 2 "O' rings on the Ultra Boost coils. The top O ring needs a strip of just less than an 1/8 inch wide, wrapped 1 and 1/4 times the O ring....make sure you stretch the teflon tape, a tight wrap. And make sure the tape butts up against the bottom edge of the coil...that is the edge that seals the coil to the pod. Secondly, wrap the lower O ring, the tape will be narrower, just over 1/16 of an inch. THEN screw on the air flow ring. The air flow ring needs to be pretty damn tight. I use a pair of pliers. At pretty damn tight the air flow will be wide open, but you can dial that back a bit without loosing the ring....LAST step....becuase of the tape on the upper O ring, you need to give the coil a good solid push into the pod...a tighter fit than without the tape, obviously......you will have much, much less leaking following these steps...even when you top off the pod with more e-juice.....