I bought a 1/18 WLToys A959B last December and a few runs in I broke a front A-Arm, so I thought Id just replace it with an aluminum arm, that lead to the whole aluminum upgrade kit, then carbon chassis, Yeah Racing shocks, metal wheels, metal gear set, 3D printed side trays and a functional roof scoop that put air onto the motor...
I repainted the "headphones" body matte black
Then I upgraded the electronics with Hpbbywing ESC, Punisher 17.5, 2 Lipos to give it 3000mah, Fly Sky GT5, faster servo...
I think they only thing that was stock when done was the diff cases, I read people had fitment issues with the metal ones.
All said and done I had over $500 into a $60 car.
After it was built I only drove it once to shake out the bugs, it wasn't as fast as the stock setup, but it had more torque and was still uncontrollable.
I ended up reinstalling the stock electronics in it and sold it on eBay, at that point I only lost about $100.

Either way, it was still a fun build.




I also had another set of wheels and a truck body, but the turning radius was reduced as these tires were bigger and would hit the chassis:
