Help with a turbo build up.....please

What all do I need for a botom end build up?
What I know I have to have so far…
New berrings for Crank
New piston rings
Block Guard
Am I missing any thing???

Another Question:

I have herd some regret getting a DRAG kit and say that it is cheaper to get the parts on your own. How can this be done?
If this is the case are remanufactured turbos any good???

Thanx again for you help…

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