Motor conversion for the Axial SCX24. The author reports that the original motor often burned out under long-term load, so this upgrade aims to provide higher speed and better performance in extreme conditions like mud. The author states they initially printed the gears in PLA, but found PET-G to be most effective. They also tested ASA, but noted that the small gears deformed during printing because the ASA could not cool fast enough; therefore, the author recommends PET-G.