3d printing an RC track car from scratch- looking for feedback

https://preview.redd.it/gfwg1g40dsbh1.jpg?width=3264&format=pjpg&auto=webp&s=2e516c749cb37a20fb96a4bd0cffe2a590b4870f

https://preview.redd.it/erdquf40dsbh1.jpg?width=3264&format=pjpg&auto=webp&s=0cf4892f8e9810beabc13d4e9d44342177522d1b

https://preview.redd.it/kil5wg40dsbh1.jpg?width=3264&format=pjpg&auto=webp&s=f2f5025530e79f3c415081b1c2844d9e210d1ad8

Hi, I’m 3d printing a belt drived RC track car from scratch using MN82’s electronic ( the MN82 is a cheap rc crawler you can buy for 40-50€ (45-60$) it use à 280 brushed motor and a 2 in 1 ESC and receiver). My goal is to make it reliable, easy to print and fun to drive.

Current progress:

- Ackerman steering geometry,

- a lot of several issues fixed,

- and I am 3d printing the last few items.

here is some photos of all the items I printed and a close up of the belt and a pulley.

I have questions:

- “Is there anything you would change?”

- “which upgrade is needed?”

I will sell it on Cults3D when it is finished.

I’m sorry if I make spelling mistakes, I’m French.