I got answer from Brainacs recently:
Braiins OS is currently supported only on Antminer S9 (S9, S9i, S9j) and Dragonmint T1.
Other devices are also on our roadmap, but we do not have any ETA for you at the moment.
Thanks for your understanding.
Adam [Support Team]
Braiins & Slush Pool
There is possibility that they will miss 15 series. It is lot more profitable for them to go directly on 17th series.