So it has been pretty much a week that I have been running both the z9 software (1 unit) and z9 mini software (2 units) version 2.1. The results are impressive overall this has been equivalent for me of adding a z9 mini batch 1 overclocked without having to purchase the hardware with an incremental increase in power consumption. (a total of 100w on the two mini's) have not measured the Z9. So well worth it thanks. One of the z9 mini's was a batch 1 so only a small increase was to be had.
@grenwolde - thank you for the review and I'm glad it has been beneficial to you. I think if you measure your Z9 you will find the power increase linear relative to the hashrate change. I hope to spend some time working on trying to improve that in the not to distant future.
Thank you,
Jason