DHL just dropped mine off

I love the blue, it is very deep rich color. This mod is tiny, much smaller that I had anticipated. With a Nautilus on top at 2 Ω, it regulates down nice and smooth to 3.8 volt, and 7.8 watt, in their respective settings. I wound up putting a strip of clear tape along the seam opposite the screen. no more wonky cover, and the tape acts as a hinge, there is a small detent at the bottom to pry the cover.
This thing has some heft to it, 8.26 oz / 234.3 grams loaded. It's going to take me a while to get comfortable with the fire button, not sure if I'll thumb it or trigger finger it to fire. Just going to use it and see whichever habit I fall into with this mod.
The little hole on the bottom, I can see a bit of what appears to be copper in there, Could this perchance be a re-set port?
I'm going to charge my batteries in my Intellicharger.