When I did commissioned prints I used Atomic almost exclusively (had to get some colors and tpu from other places) and I don't have enough good things to say about their filament and customer service.I use Fusion 360 and I slice with Simplify 3D.
I think when I go to print my final version of my Skimmer cleaner I am going to try Atomic Carbon Fiber Extreme Black PETG
I picked up a few rolls of their carbon fiber petg that was dirt cheap because it was "out of diameter tolerance". I ran each roll through a 1.75mm Guage and only had 3 spots that got hung up and I had to trim out. Turned into 6 smaller rolls of filament but printed really well.
Just make sure you use a coated nozzle or hardened steel nozzle, not brass, because it is abrasive and destroys nozzles fairly quickly (though nowhere near as much as glow in the dark or metal fill).
