The following point came up in conversation today. It sounds logical, but so obvious I may be missing something since I haven't heard it b4.
Let's see if I can explain. Let's say there's an unbalanced core with heavy side to the outside for a right hand bowler. When rolled, the previously outer block will be rotated to (in this case) the inside of the ball.
For a lefty, it is moved laterally, but since a lefty goes from the opposite side, the heavy side will end up on the inside, outside when rolled, creatng a very different reaction. If true, it explains a lot. However, it's too obvious, so I must be missing something, like say, it's moved over so much laterally that there is no difference.
Lousy explanation, but you get my drift.
Make sense?

Thoughts?
--------------------
Signature? I don't need no stinking signature...