yeh, i just finished building my sub. I made it entirely by myself, with fibreglass and mdf wood. It fits perfectly in the corner and sounds awesome, but lol, probably doesnt compare to those machines you got in the back
. I calculated it to be around 40L or a little bit above, but its round so its probably a little bit inaccurate.
I took heaps of pics making it so i might post up a 'how-to' later on.