Quote Originally Posted by MoSch View Post
...a press-fitted ferrule? In the latter case the dimesnions of the hole would be even more important...
I cannot find proper descriptions of those bushings (and the Babicz homepage isn't too helpful either: https://www.fullcontacthardware.com/...g-body-inserts )
It's this one. I have found that calling or emailing the mfg sometimes gets you the info better than searching web pages. Babicz wrote back the one time I asked them a question... FWIW.

Is there a reason why the bridge isn't mountet with the screws through the whole body and sleeve nuts on the back? This seemed to me a very strong connection?
Not that I have ever seen written. I think it may be to keep the back as clean as possible, but Danelectros have screws in the back. I also think that is why some three point bridges are string-through. To help keep the bridge in place.