It's probably balanced as a unit like all cheaper units. It is cheaper to balance that way. It lets bents shafts get balanced and units out the door. if it is, you will see the grind marks at the end of the turbine. That being said I would be curious to see if he has actually checked the turbo for wear, or thinks it's OK just because it hasn't blown up. There is a big difference. My master power was still running 6.40's worn the hell out when I took it off.
thats what i have on the inside of mine once i figure how to put the pics up on here i will to show proof they are junk