This is a housing for a relay-board I got from DX (http://bit.ly/1N9CUAT can I do this ?) it says FC-28 on the pcb.
The relays sticking through is something i saw in another design here on thingiverse and I like the idea, these things get a bit warm sometimes; its nice to be able to cool them this way.
Its a snug fit, but seems to work fine.
Work in progress:
Cable terminal holes are half a millimeter off, perfectly usable but not nice to look at :D