None. Look elsewhere. I've been playing predator since the late 90's until now. Had almost every one of their shafts under the sun, except their new stuff released in the last 3 years. I can put on the very early 314's from the 90's, and a brand new Z-2, and even the predator break shaft from the BK-1 I have, and play almost the same with all of them with almost no aiming adjustment. But if I try a regular shaft, I miss every shot by 2 diamonds.
If I gave an arbitrary squirt scale of 1 being highest squirt of a traditional maple shaft with an ivory ferrule and 10 being a lowest squirt predator Z-2, it would go like this:
1: Traditional Scruggs ivory ferrule maple shaft
2: Old school regular Meucci shaft, regular McDermott shaft
7: McDermott I-3
9: Predator 314-1, 314-2, Predator BK-1 Break shaft
10: Predator Z-1, Z-2
These are my personal experiences with shafts I have played extensively, and not only test hit.