I got this one to try from fasttech:
https://www.fasttech.com/products/5560200
There is no groove cut into the center pin. That means it is totally unusable unless you have a spare from an authentic or sxk nextiny.
-1 out of 10.
I'm yet to try the other model on fasttech.
The one I picked up from Slowtech is least thats what the little bag says. airflow and everything work beautifully compared to the original versions of the cloneSXK are normally 9.9/10 quality. The nextasis clones aren't SXK are they?