From what I hear, many people had probelm with the ferrule breaking on the Z2, don't know if you have the problem, but none with the OB2s. I just purchased an OB2 over the Z2 as well. I have put the OB2 down for now and try to get my game straight with my standard shaft before I switch any equipment being a beginner. Not to mention, Royce at OB is one of the easiest guy to deal with and he stands behind his product 100%.
Hope this helps, have a good one.
Chino