So what happens after alerting Ken Enya (have you alerted him yet?) to a suspected issue you go ahead, run the engine and it turns into a known issue?

I know Ken is an easy going guy but you did say you were going to post it to him firstly and now your not - see my point?

But none of us are going to solve this over the net.

My limited experience with high speed ball races says that if the correct race is installed (I highly doubt the wrong one is) and it has no play whatsoever, feels and sounds tight, but spins freely then it is in crooked or clamped down too tight by the case.
A way to check if the race is in crooked is to take the crankshaft out, reverse it into the front of the engine and wiggle it in circles, the wiggle should be even in all angles, if not then the race needs to be refitted.

Worse case scenario, the race wears quickly and you get to pay for it, best case scenario - well Ken has already spelled that out for you.