I decided to take a gamble and order the $12 Kayfun PMMA. So far, it's the only FastTech order I've regretted. The draw was too airy, (fixed with some rolled up mesh stuffed in the air channel) and it's a dry hit wonder. I dremeled out the wick channels, but performance is still sporadic. The chimney is different from all the other Kayfun clones, which makes interchangeability a pain in the rear. I bought this one to nano kit out, and I ended up using parts from a Kayfun Lite +, a spare o-ring, and the big nano kit top piece to make it somewhat workable. I still get the occasional dry hit though.
So my next order is waiting to go out. I'm pretty pumped up for this one.
iTaste UCan stainless e-liquid bottle
https://www.fasttech.com/products/1357000
Vapelyfe drip tip
https://www.fasttech.com/products/1650004
Variable Voltage Kick
https://www.fasttech.com/products/1646300
Brass GP Paps mech mod
https://www.fasttech.com/products/1677404
Vicious Ant Chaplin drip tip
https://www.fasttech.com/products/1662200
2 Atmos drip tips
https://www.fasttech.com/products/1549801
https://www.fasttech.com/products/1549803
Orochi mech mod
https://www.fasttech.com/products/1692400
Kayfun 3.1
https://www.fasttech.com/products/1630300
both hybrid kits for the Kayfun/Nemesis
https://www.fasttech.com/products/1662400
https://www.fasttech.com/products/1666400
Stainless Nemesis
https://www.fasttech.com/products/1448300
long drip tip
https://www.fasttech.com/products/1563408
#Vapeporn drip tip (Due to copyright claims, FT cannot show it with the "#Vapeporn" engraving. It still ships with it though.

)
https://www.fasttech.com/products/1680000
Vapelab limited drip tip
https://www.fasttech.com/products/1695000
Dynasty drip tip (due to copyright claims, FT cannot show it with the engraved "D". It still ships that way though.

)
https://www.fasttech.com/products/1679700
and an assortment of other drip tips.
FastTech is my go to for drip tips. I'm acquiring quite the collection, and unlike some of my expensive non-clone drip tips, actually fit pretty much everything I own. I know most are not exact 1:1 copies, but for drip tips, close is good enough.