OBS Engine 2
This is a dual coil banger that measures 24mm at the base, but widens to 26mm at the glass. It's 56mm tall, and holds 5ml of liquid.
If you've ever looked at an OBS Engine V1 or OBS Engine Nano, you'd be hard pressed to immediately spot any significant differences... Same style 510 drip tip, same raised platform airflow, same pop-up to fill method, same propeller logo on the barrel. On the surface, the differences are in the slight belling (24 to 26mm on the 2 vs 25mm on the 1), the lack of extra silver engraving on the 2, lack of internal cage on the 2, and resin vs delrin drip tip.
Inside, things are a lot different... The deck is a set of Ts with Philips screws, and bottom airflow.
As such, there's a learning curve to building this. The coils (which should likely not exceed 3mm for exotic or 3.5mm for round wire builds) have to be poked in and up over the airflow. Once in position, tighten the screws without letting the coils drop (I bent the leads out to kind of lock things in), then position the coils.
As usual, I made a 3mm ID 6 wrap SS316L fused Clapton (2x26/36) spaced build.
Although I did not take pictures of it, the barrel has slots for air to come down the sides and exit under the coils as well as tabs that index with notches in the deck to make aligning the base easy.
Wicking is simple once the coils are setup properly. Just tuck the tails into the provided slots (don't pack 'em, but do fill 'em).
This build, oddly, came out to 0.14Ω, but it's vaping great on the Ijoy Avenger in TC mode.
Honestly, this doesn't feel like a version 2 to me. It's a version 1.5-ish. I wish they had included a bubble glass and expanded airflow to the edge of the tank to accommodate an 810 drip tip. This would have also allowed for a little more air. As it is, the air is not much different than on the version 1.
That doesn't mean it's bad. In fact, it's good. The flavor is better than the version 1 and gone is the spitback that almost always accompanied the first few pulls after a fill, but it falls a step or two short of being great.