I really dont see the point to the rule. You can do w/e you want with yours, just gonna lose numbers tho.....
you'll see what I mean when you get those little things in a box and good luck porting it, with a box that small. talk about a LOOONNNNGGGG port.
At least with mine, all 3/4 mdf //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif . Not alot of internal volume.
I advice anyone not to start the project yet, jsut get the equipment to do so...may bend the rules a bit and be disqualified. haha.