I am looking very seriously at buying a printer, but I want to specifically be able to print nylon components. I am also pretty interested in composite reinforced nylons, but that’s not as critical at the Cetus price point.
I have been able to find a few printers that promise this capability. But none of them have linear guides. That industry standard component is a huge plus for the cetus.
I just did some prints with Taulman's Nylon 230 and it worked well. It's a bit Baltic around here, so I use a small cube heater to bring everything up to 'room temperature'. The nylon was more finicky about temperature than any other filament I've used, and it could be stringy if I wasn't careful, but I am happy with the results.
I also tried out Formfutura's CarbonFil, and had excellent results. I haven't tried anything like CarbonX, but given my experiments with these other two, I'm fairly certain great prints could be made with nylon composites.