I have used ones.


Show Details for Invalids:
Worker Name:   Work Diff   :Last Share   Shares   :Diff   :Share Rate   «Elapsed   :Invalid   Block %   :Hash Rate

philipma1957.one   9.493k   5s   13,742   130,452,806   13.71THs   1m 53s   0.131%   0.033%   12.59THs 
batch nine 1 dead board 1 dead controller fully repaired

philipma1957.two2   11.229k   1s   11,775   132,221,475   14.94THs   1m 53s   0.093%   0.033%   12.12THs
batch 2 always worked 0 issues

philipma1957.4   8.739k   1s   14,023   122,546,997   13.62THs   1m 53s   0.093%   0.031%   11.61THs
batch 3 or 4 always worked 0 issues

philipma1957.6   6.947k   9s   13,168   91,478,096   10.56THs   1m 53s   0.114%   0.023%   8.79THs
batch 1 had a dead board replaced needs a second board replaced.

philipma1957.7   1.042k   1day   0   0   0GHs   1m 53s   0%   0.000%   0GHs
rollover s-7 not for sale.

Total: 5 (3 miners)   52,708   476,699,374   52.83THs       0.107%   0.119%   45.11THs


so any of the s-9's can be shipped to the USA on Monday