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.