Sorry we are not, we are waiting to be online. Rigs are not online, we cannot make money, we are more anxious than you.
Update from mining farm, Z11 rigs may online this week.
If this is true then I apologize, I know things have not been easy and many new challengers are here in 2020.
Though in the online mining world, when long times without payment start happening, it always ends very badly, sadly.
If the Z15's are stable, perhaps offer a Z11 to Z15 trade in.
Free's up spots for Z15s which make more money for both parties due to efficiency and uptime.
This might be good, but they never will because they have too much Z11 in stock and because Z15 now sells better.
I have invested a lot of money in Z11 and bought many miners through antminer in the past, have been using hashnest since it was born and have never done such an operation.