I will do it again here. Post it all up. I will also not discard the male seeds to see if they turn male. Last time i just threw them away. I have at least two strains I can do. Let me see if i can get a macro lens for my phone.
I do know this, it is much faster and easier to make feminized seeds that to look one by one to try to determine sex even if this method were 100%.
A normal ratio is about 50/50, but I have had roughly 80/20 males from my last pollen chuck. Maybe this can be used to increase those odds. Of course, I could also make a bunch of feminized seeds at the same time it would take to run that experiment.