Can Anyone Disguise This Variation?

[Laggsy]

Well I must be pretty hopeless because I do my bowling practice with two-colour balls and even then I can't quite tell what it will do off the pitch. And it's got to be a lot easier reading the seam from the bowler's view.

You'll get there. I just comes with experience. You need to watch the ball closely and you should easily be able to figure out which direction the ball is rotating.