Be careful before printing this race car know that this one is extremely fast.
So make sure you can control this beast of race in any circumstance.
I printed the car with PLA but for the axles if you have a stronger material it will be better.
The screws and the axles have to be printed with a resolution of 100%.
If the parts don't fit together, your best friend will be the sand paper.
If you have some problem let me know in comment, maybe I can help.