After reading this entire ridiculous thread, I had to ask myself why are you wanting an OB-1 if you don't like them, and why not go with the Predator Z-1 that you want OB-1 to emulate? So, I reread your posts again and see that the real issue is you want competition because of Predator's supposed quality control issues. If you don't like the way the current OB-1 reacts, I am sure they aren't the one's to make something to compete with the Z shaft. It would just get worse. I had an OB-1 and never really cared for the thud and softer hit myself. Now that I understand there's Balsa wood in the ferrule, I can see why it sounds like it does and wonder if that was planned to help make it float in case your game sinks to new lows playing with it..LOL..
It seems to be a good shaft and I really didn't have any issues making balls with it, but it as a long time 314-2 user, I think it would take me a while to feel 100% comfortable with it's sound and hit since I like that pall peen hammer hit myself. Other's don't.
My bottom line suggestion is talk with Predator. They have a phone number. If you can order directly from them, I am sure you can get them to promise they will back up any quality issues you have with a shaft they send to you. I am not really sure what those quality issue are, but I am sure you are. If that doesn't work... You could try getting someone to put a ferrule on a toothpick, because that is about what a 11.75mm shaft would feel like to me.
OB-1 is NOT Predator and likely never will be. Please try to understand that. Predator is Predator.