Homebrew PCBs

> What diameter does the tube approximately have?

Out of my memory I'd say ~2.5 - 3 cm. There are obviousely holes
within the tube and they go around it in a spiral form aparently to
smothen the spraying process. 

I honestly can't tell at the moment (not at home) wether the holes in
the bottom plate have an angle or not.

Markus