[s-cars] Wastegate screw size?

[James Murray (QA/EMC)]

Anyone know what is the size of the wastegate screw? (thread size and length), I doubt there is a specific Audi part number (is there?)

A friend local to me (Spyro cc'ed) is MISSING the wastegate screw in the modified UrS4 that he recently purchased... he opened the unit up and there is no sign of the screw!? the car has Tap chip and hybrid turbo with cold air intake. 

What would be the effects of running without the screw? (lower boost threshold I presume) and does anyone know what the factory setting should be, or a guestimate of how far down he should position the screw once he gets one in there... 

Cheers, /Jamu.

P.S. if no one has the answer I will try to pull mine on the weekend.