Anyone on here built this speaker? It's available on diysoundgroup.com as a kit, with a flat-packed CNC-cut cabinet available as well. It's not cheap, but it sounds like the sort of high-efficiency, powerful speaker I've been wanting for a while. The reviews are excellent, and it seems even the designer seemed surprised how good it sounded, considering he was trying to make a "budget-ish" version of a TOTL design.
http://www.diysoundgroup.com/waveguide-speaker-kits/fusion-series-kits/fusion12-kit.html
http://www.diysoundgroup.com/waveguide-speaker-kits/fusion-series-kits/fusion12-kit.html