If you have used RC6 version, that should have already been fixed.
No actual idea for that yet.
Everything seems to be there that you promised, but the buffering system between 2 stocks seems to have the worlds smallest hitbox. This means that the cars won't physically collide until they are on top of each other. Also, sometimes useing Rshift to dismount doesn't work, and I have to /kill in order to get off. And on the last note while I have you here, could you please re-implement gradual braking? It just feels very unnatural when I can hit B and stop on a dime. Thank you, and good job!
Buffer physics is buggy and should be enabled in config. To dismount you should be near the side of the stock, not in the centre. What do you mean by gradual braking? Brakes work as they always have been.