Oh that's cools. Iv just got some rev x's repaired and have seen that I can get some x beams 3d printed.I couldn't find any X Beams when I recently bought a set of used wheels so I made my own carbon ones (my old career, now retired)
Iv chatted with someone about using PETG filament for 3d printing. Yes, looks stringy but it's to do with the high temperature needed to use it for printing.I saw a picture of some 3D printed ones and they were terrible imo , which is why I laminated my own