I received my EHPro KFL+ clone today
I am very happy with it. Especially at the $34.00 price point (ebay).
Nice properly rounded/bulbous clear (frosted) tank - not like the straight cut like others sell/come with.
The build quality is definitely on par with the R91%. Very nicely machined.
I like the large bevel cut on the top cap - unlike some of the other KFL clones that are almost square.
The wick channels are properly sized.
I found the airflow to be a little tight compared to my R91% - I like a more open style draw.
Needed more air. So, I drilled out the 510 center post airtube to 1/16" down the center and did the same to the sides holes.
Then I drill out the base to 5/64" for more of a venturi effect. I leave the airflow adjuster screw in - more "direct" airflow (also removing it while flush mounted doesn't help much) , but backed all the way out. Now it's more like my stock R91 (wide open).