Tilt character with acceleration

I think I got it. This works pretty well. Advice would still be appreciated.

using UnityEngine; using System.Collections;

public class Gen3_3PC : MonoBehaviour {

 float verticalInput, horizontalInput, sWangleCounter;
 public float angle, frontAngle, sideAngle;
 public Vector3 velocity, lastVelocity;
 Transform mainCamera;
 Rigidbody rb;
 Animator anim;
 public Vector3 move;
 Vector3 lastPosition;
 public float walkSpeed, runSpeed, acceleration, stepDistance, tiltPower, turnRate;
 public Vector3 acc;

 // Use this for initialization
 void Start () {

     verticalInput = 0;
     horizontalInput = 0;
     rb = GetComponent<Rigidbody> ();
     anim = GetComponent<Animator> ();
     mainCamera = Camera.main.transform;
     lastPosition = Vector3.zero;
     sWangleCounter = 0.0f;
     lastVelocity = Vector3.zero;
 }
 
 // Update is called once per frame
 void Update () 
 {    
     GetInputs ();
 }

 void FixedUpdate ()
 {
     CalcMove ();
     rb.AddForce (move, ForceMode.Acceleration);
     CalcAngle ();
     CalcAcc ();
     float accSignZ = 1;
     if (acc.z < 0)
         accSignZ = -1;

     //rb.MoveRotation (rb.rotation * Quaternion.Euler ((Mathf.Max(-1, Mathf.Round (acc.z)) * tiltPower - sideAngle ) * Time.deltaTime, 0.0f, (Mathf.Round (acc.x) * tiltPower - frontAngle) * Time.deltaTime));

     rb.MoveRotation (rb.rotation * Quaternion.Euler ((Mathf.Max(-1, Mathf.Round (acc.z)) * tiltPower - sideAngle ) * Time.deltaTime, angle * turnRate * Time.deltaTime, (Mathf.Round (acc.x) * tiltPower - frontAngle) * Time.deltaTime));

     //rb.AddTorque (0, angle * 10, 0, ForceMode.Acceleration);
     //rb.AddTorque (-rb.angularVelocity, ForceMode.VelocityChange);

     CalcRunStage ();
     anim.SetFloat("speed", Mathf.Sqrt((rb.velocity.x * rb.velocity.x) + (rb.velocity.z * rb.velocity.z)));
 }

 void GetInputs()
 {
     verticalInput = Input.GetAxis ("Vertical");
     horizontalInput = Input.GetAxis ("Horizontal");
 }

 void CalcMove()
 {
     move = Vector3.zero;
     if (verticalInput > 0)
     move += Vector3.Scale (mainCamera.forward, new Vector3 (1, 0, 1)).normalized;
     else if (verticalInput < 0)
         move -= Vector3.Scale (mainCamera.forward, new Vector3 (1, 0, 1)).normalized;
     if (horizontalInput > 0)
     move += Vector3.Scale (mainCamera.right, new Vector3 (1, 0, 1)).normalized;
     else if (horizontalInput < 0)
         move -= Vector3.Scale (mainCamera.right, new Vector3 (1, 0, 1)).normalized;
     move = move.normalized * acceleration;
 }

 void CalcRunStage()
 {
     lastPosition = new Vector3 (lastPosition.x, 0f, lastPosition.z);
     Vector3 currentPosition = new Vector3 (transform.position.x, 0f, transform.position.z);

     float dist = Vector3.Distance (lastPosition, currentPosition);
     float turnAngle = (dist / (2 * Mathf.PI * 1)) * 360f; //PI * 1 should be PI * radius, we just chose radius to be 1

     sWangleCounter += turnAngle;

     if (sWangleCounter > stepDistance)
         sWangleCounter = 0.0f;

     anim.SetFloat ("runstage", (sWangleCounter / stepDistance));

     if (anim.GetFloat ("runstage") > 1.0f)
         anim.SetFloat ("runstage", 0);

     lastPosition = currentPosition;
 }

 void CalcAngle()
 {
     angle = Vector3.Angle (transform.forward, rb.velocity.normalized);
     if (Vector3.Cross (transform.forward, rb.velocity.normalized).y < 0)
         angle = -angle;
     if (move == Vector3.zero)
         angle = 0.0f;

     frontAngle = transform.rotation.eulerAngles.z;
     frontAngle = Mathf.DeltaAngle (0, frontAngle);

     sideAngle = transform.rotation.eulerAngles.x;
     sideAngle = Mathf.DeltaAngle (0, sideAngle);
 }

 void CalcAcc()
 {
     velocity = transform.InverseTransformVector(rb.velocity);
     acc = (velocity - lastVelocity) / Time.fixedDeltaTime;
     lastVelocity = velocity;

     if (Mathf.Abs (acc.x) < 0.01 && Mathf.Abs (acc.z) < 0.01)
         acc = Vector3.zero;
 }

 int Sign(float number)
 {
     if (number < 0.0f)
         return -1;
     else
         return 1;
 }    

}