I had awesome luck to start(of course I used the planet surveyor),
(copied from our alliance board.)
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[1:40:11] Home planet, started with 320
[1:40:13] 320 fields, 1st attempt
[1:40:14] 320 fields, 1st attempt
[1:167:13] 320 fields, 2nd attempt
[1:167:14] 320 fields, 1st attempt
[1:167:15] 320 fields, 5th attempt (previous best of 187)
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Including these, it took a total of 63 tries to get the 8 colonies with a perfect 320 field count. The last one was the hardest, Took 26 tries for the last one alone!