I've got my mind set on building a cab, and i'm planning on aping the style of the Bag End S15, with a few modifications. I'm thinking of making it 18"x18"x18", using a Bag End 15" speaker, with a 5" port. Since I can't read WinISD to save my life, I'm curious if any of the cab gurus can guide me, help me figure out if this will work. I imagine it'll have a bit more low end than the regular BE S15, but still be very mid-centric. thoughts?