My Z9 mini has been running for 44 days straight at 750M with an average sol rate of 16.37.

I have seen my Zcash per day steadily drop for the last few weeks and is now at 0.0927 Zcash per day. 

This machine has been great but it looks like the full size Z9s have started to come online and the hashrates are going up big time.    Fun while it lasted!