So AMT ngv is bolted on to the the bearing housing. I like that setup better, Before assembling the case you can tell if your turbine wheel and the ngv is align properly sweet

I always wonder how AMT all in one case and cone work.

Looking at your caliper reading your turbine wheel 65.20 but your ngv 65.15 ??? . How many injectors your engine as ?.
I'm doing some experiment my self with a 32 lb engine. Its running ok with EGT of 480 max power.