I couldn't see this in the FAQ. Will project PCBs fit in a 1590B box -
the Keeley, Catalinbread, Xotic sized enclsoures?
thanks
Many of them will, but it will always be easier to fit them into larger ones.
Look at the last page of the pdf's. If a particular project can fit into a 1590b/1290s it will say so there.
Also, have a look at the build reports room here, where you can see pics of the different ways people have approached fitting everything in.