For the Zig Z1+ - I installed 20181116 and am only hashing around 6.0-6.2 Gh/s between 800-925Mhz...not consistent rates across different pools...have done the soft resets, pulled the power and waited, etc.

Of the four firmware releases - 20181015, 20181029, 20181105, 20181116 - is there one in particular that seems to be the "best" from a high hashrate and consistency standpoint?  I'm considering flashing back down to an earlier version, but would love to save the time if anyone has thoughts here.