FixedUpdateHoverForce

    //  Hover Force
        RaycastHit hit;
        bool  grounded = false;
        for (int i = 0; i < hoverPoints.Length; i++)
        {
            var hoverPoint = hoverPoints [i];
            if (Physics.Raycast(hoverPoint.transform.position, -Vector3.up, out hit,hoverHeight, layerMask))
            {
                body.AddForceAtPosition(Vector3.up * hoverForce* (1.0f - (hit.distance / hoverHeight)), hoverPoint.transform.position);
                grounded = true;
            }
            else
            {
                // Self levelling - returns the vehicle to horizontal when not grounded
                if (transform.position.y > hoverPoint.transform.position.y)
                {
                    body.AddForceAtPosition(hoverPoint.transform.up * gravityForce, hoverPoint.transform.position);
                }
                else
                {
                    body.AddForceAtPosition(hoverPoint.transform.up * -gravityForce, hoverPoint.transform.position);
                }
            }
        }