I did speak to AMT the other day. Jim confirmed they ware waiting for the A1 chips to arrive before the 1.2 TH miners go into production.
no eta provided.
If you get hold of him again, ask if they have their own boards or are they also getting their boards from BitMine.ch
I am hoping for the latter answer ( would mean faster deployment ).
Also, ask if they already receive sample chips from Bitmine.ch.