Updating for my review. My Derringer came in the mail Saturday to a friend's house (easier to tell my wife I "traded for it at work" lol).
I got it today at work and threw a quick 24ga SS316L 3.0mm dia 8 wrap dual coil coming in at 0.2ohm (my go to build), wicked it with cellucotton and threw it on my DIY 100w TDK Lambda box at 4.3v with about 1 1/2 airflow holes open. Dripping some Dr. Crimmy's V-Liquid Crimm Brulee.
The flavor off this thing is to die for. I was worried about juice spit because of how low the cap is to the coils, but I haven't gotten any yet. My previous "small chamber" atty experiences so far are the Hobo v2 and Vertex v2. This blows both of them out of the water. Its the perfect combination (FOR ME) in airflow, warmth, density of vapor, and flavor. It's literally everything I've been looking for in an RDA. Dripping on it is also 10x easier than other atties I've used because I have a tendency to over-drip and spill everywhere. The ring around the outside is great for making sure no extra gets out, and the juice well sucks it all right up.
The machining on this device is also very nice. It's actually one of the best quality clones I've ever received. I have never gotten a clone that didn't require some sort of tweaking or tightening to get it to work correctly. There was a little machine oil that I washed off pretty quickly with some hot water and dish soap and has left no remnants in the flavor.
The allen set screws in the posts are butter smooth, and didn't require nearly as much force as other atties I have with Philips heads. The center post holes are somewhat small, but i had no issues getting (2) 24ga wires through it. Might be a little tougher with larger wires. The negative posts have little slots rather than holes, which makes center builds MUCH easier without bending and warping the coil and causing hotspots.
THE ONLY thing I may do to change my vape experience on this device is get a slightly longer delrin drip tip. I'm loving its compact size, but i don't like putting my mouth that close to the cap lol.
My overall rating, on this particular clone from the website I listed in my first post, is 4.5 stars (only because I'm assuming the authentic is made by the hand of God himself and has to be a 5.0).