How to improve this model?

Car4.rbxm (105.8 KB)

So here I had a basic a-chassis model I decided to put my beta version of the car on it, BUT… I want for example the wheels of my car to turn together with the a-chassis, and also to make the suspension move, in general, so that it was not just an external component, but physical. So I don’t want my model to be able to move as well as a-chassis. If anything, I did all this according to this minute guide:

I’ve attached the car file below so you can experiment if you want.