Great idea and works perfectly! Richard reinforced 3d printed parts with carbon and aramid (kevlar) fibers and achieved great increase in strength and durability!
Kudos to you RichMac46!
Mar One , the first carbon fiber 3d printer is released. it basically uses similar method, but much more advanced:
Here is a detailed construction log and manual by Petr Rubeš on how he used this technique to produce light and strong drone propeller carrier.