Originally Posted by
dark_luna
I use carbon sheets from Hobbyking.
19T Pulley #SAK-07A from 3Racing works fine (original pulley are 18T), mounted in the rear creates overdrive on front wheels.
You can also use these white derlin pulleys from Tamiya.
53989 18T Pulleys Derlin
They're for the 501x, but also used on TA06 pro.
For the spur gear carrier, you can use the aluminium one from FF03 as well.