If you have the later, solid model I wouldn't worry about it. I've run one of these for years and have had zero issues.

Ever since I came across a flawed first-gen TI spindle (the borings from either end didn't meet flush in the middle during manufacture, resulting in a stress riser in the center of the spindle) I've wondered if something similar was the case with the other failures. Maybe it was just a bad batch. Mine came from Deeside Cycles in the UK and was dead stock; alloy cups/TI spindle. I rode it for a year or more before noticing the flaw during a BB service.

Don't know enough to comment on the rest, but I wouldn't be confident enough in the hollow spindle to use it. Solid, yes.

DD