After running the balance of the test procedure on Q3 on Thur, we dropped the ECD blocks onto both chains.  New TFs revealed than something was then touching.  After another few hours of BOSEM/ECD plate alignment (which basically pushed us back through a portion of the test procedure), we finally found the slight interference.  Rob is back to running the TF gamut.  Of the 12 he had to re-take, he has 3 left for Monday.