I'll have to agree about the Immortalizer. It produces great flavor with it's reduced chamber.
The clones had issues with the screw holes stripping out.
I have 3 of them from FT, and they all needed modification to not do so.
It was a very easy fix though. I used a short piece of 29ga kanthal bent into a u shape and stuffed it into the screw hole.
this allowed me to tighten the screws all the way without stripping the threads.
I'm not sure if the issue has been addressed.
But I can tell you FT sent me a replacement base, and it did not have the issue.
FT has them on sale for 12bux right now. The regular price was 17bux.
Even at 17 bux, and having to fiddle with mine to get the deck screws to hold, I'm still happy with the value. Mostly because i don't mind fooling with stuff. Especially if I save a ton of $, it's still worth it to me.
https://www.fasttech.com/products/0/10005571/1436801-immortalizer-rda-rebuildable-dripping-atomizer
Smaller RDAs are nice in the sense that they provide great flavor, but I have gigantic hands and fat fingers, so I personally like a slightly larger deck to work with.
Also a larger RDA provides a little more area for holding juice, which isn't a bad thing.
I recently picked up one of the fatty v3 clones from FT. Despite it being fairly large in size, the internal volume is small enough that it also gives good flavor.
Not Immortalizer good, but better than an IGO L or W.
The bottom airflow is nice.
It is quite fiddly to build with, as there are several parts/layers and insulators that need to be put into the proper orientation.
Not a fan of how the coil screws hold the whole thing together. I do like the screw on top cap though.
Trident clone is pretty good, but I'm not a fan of it's construction. I have one, and won't buy another.
For a smaller rda, the FT v6 is pretty sweet.
I have it on a 14500 bagua clone and it is a flavor machine.