Sooo, it's been a while... job and health ain't friends of my bass project ;-)

But meanwhile i got myself a japanese saw and dowels and practiced on cutting boards (i also used those to practice shaping the headstock). Well... some more training until i feel fully prepared, but it gets more promising.
Also I practiced with the cheap drill press - that won't work, I will find someone with the real thing.

Nevertheless I startet thinking about the bushings to mount the bridge.
Especially if I want to drill suitable holes I want to understand how they are working first. So I got some more questions:

1. Are the bushings basically blind rivet nuts that are tightened by deformation by the screw or is it 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 )

2. 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?