JR . . .
I chuckled several times reading your "Journey of Sexing Koi."
ppp . . .
A lovely koi. Only time will tell whether it's going to go up, hold at it's peak for a while or head downhill as a 'full package' koi.
As for sex and size, to paraphrase Art Lembke: At a certain age and a certain size, the appearance begins to supercede the reality. In other words, that a male-looking female might as well
be a male. Again, only time will tell.
Eugene . . .
I see no reason why being shown one or twice per year during a koi's relatively short showing window should harm a koi since when done properly the stress should be both minimal and short-term.