Anybody built a box for a B&W ISW-3 Subwoofer

I just got two in.  Anybody using these?  Have you built an enclosure>  I now they're designed to be able to be built into a wall or ceiling, but I prefer them to be free standing

http://www.bowers-wilkins.net/Speakers/Installation-Speakers/In-Wall-In-Ceiling/ISW-3.html


Here is one idea of it installed, but I'm talking about building a box around it and leaving it as a free standing sub


http://home-automation-services.com/tag/bw/