Cheap Ebay GT-45 upgrades? possible?

Actually i read through MAD DART's thread and I did not see were he opened up and checked the GT 45's unless I missed a page.Mad Dart went to the trouble to check other components I wonder why he didn't check the Turbo's???
I hate to take mine apart and ruin it but it sure looks reasonable with the propper tools
I AM CURIOUS AS TO WHAT GRADE BEARINGS THEY ARE USING? THEY MIGHT EASILY BE UPGRADEABLE.
I rebuild HIGH speed spindles for machine tools as a function of my business so I Know bearings and can get them for 50% off list.
IF ANYBODY HAS PULLED ONE APART THEY COULD SAVE ME SOME TROUBLE IF THEY COULD GIVE ME A HEADS UP AS TO WHAT THE BEARINGS ARE IN GT-45

FOR $260 FOR THE WHOLE UNIT THE BEARINGS HAVE TO BE SOMEWHAT INFERIOR!!!