I don't think you should second guess, as someone above mentioned. Zencash returns have dropped about 25% in 1 month, this is only with the Inno A miners out and Batch 1 Z9 minis. Come late Aug. when Batch 2 drops and more inno miners coming online, and everyone switching to the same algorithms, i can imagine the returns dropping alot.
Most of our sales are still the mini as there is only speculation on the "full" Z9. Buyers know what the z9 mini can and cant do as well the next batch is slated to ship sooner than the Z9.
Z9 is a good buy but the Z9mini is a safer choice when looking at these two models by bitmain.
I am starting to second guess my choice to not buy more mini's. I was worried about the forks, and in the back of my mind I think Bitmain is about to release new sha256 and scrypt miners. So I thought I should hold onto some cash in case that happened. But I thought for sure Bitmain would be dropping new miners on us by now since all their coupons are expired.