Replying to Alpha 1's

Just a couple of questions.

How well do these bad boys hold up on 40 foot+ jumps?

Do they ride short due to the rocker?

I have also heard that "centre mounted" is actually -2.5 back, due to extra rocker in the tips? Is this the case?

I have owned the AR6's for a couple of seasons, but they broke last season. What is it like going from a ski like the AR6 to Alpha 1's.
I have been recommended them by a friend, but I would just like a to get a little bit more info.

+K for legit answers.