Mike: my heart sank when I saw your first posts about this. All that work! You deserve better luck!
Thank you for posting all this here though. As others have said already, most of us have only ever heard rumors of Type 1 fans exploding, and never seen any direct evidence. It's really helpful to read your detailed description (5600 RPM! Not "over 5,000," or "5500" or "5700") and well-composed photos.
Here's hoping it's but a minor bump on the road to smooth and twisty pavement.