You have to factor in the nut keeping the compressor wheel on however, if it wasnt balanced along with the compressor wheel and turbine wheel then that would throw the balance off when reassembled?
Bit over my head this stuff so sorry about the questions....
I have had 4 of these k24 turbos apart.
There have been no grind marks on any of the compressor nuts.
By deduction, we can conclude that a normal, symetrical nut has no, zero, nada, influence on balance of the rotating parts in a turbo.