Brillouin seem to be doing very well - except I can't see why they haven't sent out their 'tech packs' already. I just hope their transparency continues and it doesn't end up like Leonardo Corp.!!!
I think they have not yet reached the consistent and controllable COP that would make the HHTs commercially viable and will only send tech-packs then. They are confident that they will reach it (they were on their way to that when they ran into the melting caps problem).