What size allen head is needed to adjust the Idle mixture on the Bosch FI

[PAV]

What size allen head is needed to adjust the Idle mixture on the Bosch FI.

on my Zagato it is a bit of a blind operation so I am looking to pick an answer so I don't have to remove the Air Flow Meter / associated hardware and look!

Much thanks!

pv2

[Todd D.]

I made my own tool so I could do the same thing.
I used a 5mm allan key , cut it and welded an extension so it was around 7 inches long.

Todd

[PAV]

Thanks Todd!