That's good to hear!
Not to threadjack but 6 1070's vs 4 1080Ti - which would be better?
For zcash
1070 = 450 sols at 60% power limit
1080ti = 620sols at 60% power limit
Depreciation wise, we can assume both these gpus will depreciate at least 1 tier in gpu performance after a year.
1070 = $200 - $250
1080ti = $400 - $500
Lastly, rig density is better for 1080ti. I went with 1080ti because my apartment is tiny, but 1070 is good if space is no issue.