DAMMMM that BTL gets down!!!!!! I think you need to put some lead on your trunk, not deadener, just to keep it on. That's a nice build, fbi. I love that kerfed box. I was thinking about doing one, but I was too scared I would mess it up and not get the kerf right. You know, I've actually thrown around the idea of getting a BL or BTL. How does your BTL match against the XXX? My guess would be that the sound quality wouldn't be quite as good, but the BTL I think would get louder. How's my guess? I've never heard a BTL either.