> I believe the drilling is not needed. The beautycases have m3 bolds as
> standard don't they

Yes you are right, sorry for the bad info. There isn't a hole spacing
issue when you have a case that uses nuts to hold the modules in place.
I've only seen the case in photos, but I found a picture with the
nuts.

http://www.doepfer.de/A100_beauty_raw.JPG