Well its actually a cbox but because my mate Kirk from the bli bli cable in australia made the first one a couple years ago & gave me the measurements for ours i thought i should give him some credit.
Heres a pic we just finished it today.
If ya wanna see more pics of it being built & stuff check this thread out also
http://wake.com.au/modules.php?name=Forums&file=viewtopic&p=373334#37 3334