i have rebuilt 2 roller bearing turbo's used t3 shart's and ground down
to size .i had to get my own balancing machine to balance the shart's
had one on my 620ti t04e compresser and a . 86 turbine and had no
problem other than melting the tip of the turbine

the other roller bearing is a t34 with a 48 turbine to fit a cossy
but drain and oil feed is t28