Q:Components cannot be separated
A:There must be a gap between the part and the part, and put them together to be one part.
Q:Turn on body is respondable, the components cannot operate on the normal track, it will flutter.
A:Because the interval between the solid and the solid cannot be 0, there must be gap.
Q:Turn on body is respondable for the track, the simulation will be very lag.
A:Turn it to collide with the ball.