I looked for the serial number list and don't have it. I never hid anything from a customer but when I told them how many I had done they knew there was a problem. I got my tit in a ringer many times with my company because I was always up front with the customer. Maybe that is why I have a good customer base today.
Your distributor has the list, trust me. I probably have a few photos of what that front bearing will look like when it is pulled. There will be missing rollers and the gage will be in pieces.
I think a big part of the problem was the labyrinth when using live tools and blasting the stationary main spindle with high pressure coolant. The labyrinth is designed to work when rotating, not so good when stationary, if that makes sense.
The squeaky wheel gets the grease, and Okuma warrantied a lot of these that were well past the one year warranty, at least that is what is heard.