Roger, I am fascinated by how you "dissected" the kois and did your detailed evaluations. I hope they will turn out the way you described which is more than I dare ask of them. We will know over the next few months. I suppose I can thank my lucky stars you did not notice her before I did.
Mike, the kohaku was bought by the dealer after the last auction at Sakai Hiroshima and was brought in a couple of months back. The hi faded badly the day after and I presume that was why noone paid any attention to her. I was immediately attracted to her nice body and shiroji, and told the dealer I will buy her if the hi improves. It is guaranteed by Sakai to be a female. You rightly hinted that by eye-balling her she looks quite masculine with the strong pectoral and tail fins. Believe you me I have my reservations too. I "molested" her so many times over the past couple of months and each time I cannot find any evidence of it being anything other than a female. Anyway I have been proven wrong before and only time will tell.
The showa was an incidental purchase. She was in the same pond as this kohaku. I noticed her while looking for the kohaku and after netting her my mind was made up. Again only a probable female despite the dealer's guarantee.
Lets see how they develop and many thanks.