I have the real thing. Currently the default 1.2mm insert is installed. I tootle along at a whopping 12w in the morning and by evening she's humming @ 20-25w. I did buy the 2mm for a more airy MTL and some others for restricted DL.About that Dvarw. The largest insert is 2 mm, correct? I can do 2 mm. Do you have a clone or the real thing?
There are 0.8mm, 1mm, 1.5mm, 2mm, 2x0.8mm, 2x1.2mm, 2x1.5mm, 2x2mm, 3x0.6mm and 3x0.8mm AF inserts. Also a blank one if you are so inclined to drill your own.

FT has the clones and accessories. I wouldn't hesitate to buy the YFTK or SXK. I've had good luck with both cloners.
Mine is 2 weeks new and I love it. Solid vape/great flavor/super easy to build on.