So the "mod" is a mechanical bottom fed (squeeze in the square hole and a little juice wets your wick) system. It is an "REO Grand". The atomizer, "RM2" has a hole in it (for squeezin's) a ceramic base, and performs wonderfully. The wick is Nextel ceramic rope. And the coil is a perverted "Micro-Coil" of 26 gauge Kanthal coming in at about .8 ohm (if I recall correctly). Micro-coils intensify flavor and vapor; usually producing the qualities of a lower resistance build. (Most folks build their micros above 1.5Ω) The REO is a vaper's dream. It assures fresh-juice on every tuck, fits nicely in a pocket (~ size of a pack of smokes), and is a pleasure to use.