Not asking the question is stupid.I'm really sorry! I think my problem is very stupid and I don't want to bother everyone with that.
What OS/Language are you using?Broadcom haven't fixed the problem with their I2C interface
Well it might, except I make my own microcontroller and I/O boards and have not yet needed to do a Pi/Adafruit combo.In the present case a subject line such as "Adafruit interfacing question for Gavinmc42" might suffice.
I drill them out to 3mm anyway, been doing that for 6 years on Pi'sPlease do something about "M2.5" standoffs market availability. (And perhaps try M3 holes in the next design...)