If you like to build simple modules for your eurorack synthesizer yourself, there is some stuff that is always the same. Mostly power related. Or the part where you need some sockets to plug your patch cables in. nucleus provides a convenient shortcut, here.
It is a nice board to build little modules with or to just try something. It has a dedicated place to put your power connector and three busses in the middle of the board for distribution. Also, of course, it shows some attitude. :*
To see, how to use it and what nucleus has to do with the P-0+o prototyping board by Kristian Blåsol, learn more.
If you want some, get some.