Correct hex wrench sizes for this Schaller bridge?

[Busnoise]

Hello,

I have acquired a mid-eighties' Carvin bass. It has a Schaller bridge, seen with the title "1983-1987" about midway down this page:
What Model is that Carvin Bass?

I'm in Europe. None of my mm-sized hex wrenches down to 1.5mm fit the height or intonation screws. 2.5mm is just barely too big for the intonation screws and I think it might be 3/32", but the height adjustment screws are so deeply recessed I can't tell how far off the 1.5 mm is from the correct size. Can anyone tell me for certain what it is?

[Stealth]

As far as I know tool shops around here in Europe stock both metric and imperial hex wrenches. Just ask next time you're in the shop.