High Quality Tool Bridgeport Yoke, nuts don't fit

I'm repairing a machine in our student shop...I ordered a new yoke from MSC(it shipped direct from High Quality Tool)
The old nuts drop right in on the X axis...but the nuts will not go into the Y. After a lot of careful measurement I find the bore is out of round by about 7 or 8 thou.

Anyone else ever have any problems with HQT's stuff?

I'm waiting to hear what MSC wants me to do..

Paul