The cage is basically just spotted in but attached at the sill plates. I don't want to go dropping the cage feet incase it mucks up the geometry etc, plus it will be a real ass! How I thought might work, if I can get my reciprocating saw around the back edge is I can C notch around the sill plates, if that makes sense?
http://img.photobucket.com/albums/v3...ova/file-3.jpg