This looks like the manual tweakers dream machine! Lots and lots of pots! One of my most enjoyable analog detectors was the relic-loving Nautilus DMC 2b. A true depth monster that, when set up correctly, is very hard to beat for pulling brass and lead from extreme depths.
This new Blisstool LTC64X v3 seems to be redefining the notions of what a VLF detector can do. I haven't played with one yet, so everything is hearsay and speculation at this point...however, the videos are impressive!