Screwdriver for 42mm Panerai

[jldc]

I have a new PAM 338 42mm Radiomir

The screwdrivers that I have seem to be either too small (ie not wide enough) or too thick (stick in the slot). I would like to minimize the chances of damage to the screws or the case. I am referring to the small screws used to hold the wires for strap changes.

Any idea of the best screwdriver for this?

BTW I did see an OEM screwdriver for this purpose for sale, but $125 seems steep to me, especially because, until I try it, I can't be sure that it really works better than what I have.

L