oh, please show me some schematics, even hand drawn would do, but since you 3D printed yours, a screenshot would do. just for me to understand it.
anyway I will try to guess it.
since you are saying you have 2 supports, you either put the wheel all around the motor or you put the wheel to the side of the motor in a way that the wheel structure gets the impact.
to make the wheel around the motor you would need to glue/fix the stator of the motor to the 8mm axle. Then build the wheel core around the can and fixing it to the can by means of the propeller screws.
to make the wheel to the side you could fix the stator to the frame and build the wheel core halfway over the can which is somewhat a very ugly design. (which I might try)
so I will guess you are building the around the motor and not putting any weight on the can. So, how did you fix the stator to the axle? You could make and adapter and screw it across the axle. You could make a cut on the axle to look like a shaft like a chanfer a straight cut so the stator wouldnt spin.
the main problem with this around the motor design I see is how do you manage the wires.
about the carbon fiber. its really easy to make your own carbon fiber, but its troublesome and makes a mess. its the same way they make glass fiber. you get the fiber, embed them in resin and put over your mold. wait 1 or 2 days to cure, sand it and cut it, then you get a clear resin over it to get a shiny look. BUT I didn't do this because its troublesome and I live in a very small apartment. What I did was buy the carbon fiber sheet done from ali express and cut it with a dremel tool.
My frame uses the simplest design possible for a inline skate frame. you have 2 sheets and they screw to the boot by means of an adapter which is 3D printed. I'm testing right now a 2mm thick carbon fiber sheet, but its too flexible
btw most of bicycle parts made out of carbon fiber are handmade with little to no machinery involved. I don't think thundrblade will have a so high demand I couldnt handmade most of the frames. Anyway a desktop CNC Mill would do a great job of cutting carbon fiber since its really really easy to sand it.