improve bat speed

9:57

8:19

14:49

6:19

9:44

8:18

8:50

4:57

4:33

8:28

6:23

7:34

58:11

5:29

4:23

2:53

8:17

6:47

8:10

6:33

6:34

12:45

12:04

7:31

12:08

00:03

2:54

13:02

9:45

10:04

5:10

3:06

7:41

6:25

00:44

9:42

13:12

7:06

4:22

4:20

1:55

7:45

4:56

5:26

5:12

00:29

11:38

1:51

3:10

1:02

3:11

5:20

1:48

2:22

1:03

1:01

9:41

8:22

00:41

1:43