I need to perform a complete and full diagnostic exam on the mechanical side on an S2000 prior to purchase.

I did a list of what's need to be covered and would like your expertise to make sure i covered all areas.

Engine:
Leak down test.
Compression test.
Check oil for any metal pieces
Check engine mounts for any leaks

Gearbox
Check that all gears come in without the use of additional force on the stick.
Check oil for any metal pieces
Check if the clutch slips or smells

Diff
Check oil for any metal pieces


General
Check shocks
Check bushes

Is there any other suggestions apart from the above ?

I am mostly concerned about the diff.