RussG wrote:
Looks like a re-branded V3 to me.
The difference between the V3.1 and the Lite is the base. The chamber, chimney, tank sections and drip tip are the same, as is the construction of the build deck and juice channels. The V3 base has a side fill valve and side-accessible airflow adjustment, as well as interchangeable connection units and collection cup (it can be hybrided onto a variety of mods with the right parts). The Lite has a fixed airflow and bottom fill; the Lite Plus adds a bottom airflow control (and a larger air hole); and the second batch fixes the fill hole, has a different drip tip and a very slightly larger air hole, mostly to fix the whistle in previous versions (it's not perceptibly looser wide open). All of the Lite/Lite Plus atties are 510-only.