Got Nothing Officially about this, It has been talked about for a long time but it went off the Radar about 8-10 months ago I guess.
Be an Interesting bit of kit to use though, have seen some cool stuff located with various deepbox detectors on youtube.
Saw some southern Americans dig up a giant "Sugar Pot" out of a swamp, they sold it for like 10k or something! Homemade deepbox it looked like.
Happy Hunting
Clegy