Have you ever used a loop magnifier to inspect the male flower just as the petals umbrella out but the pollen sacks are still intact?
I do to all males before final selection and use.
You will be impressed when you find a resinous male. They won’t be spiked like a female but the resin heads will run right down the pollen sack crease.
Hi, here a master kaze male I'm flowering as I can (I put him in my garden if sunny or behind a window if bad weather, and keep it in a dark room at night), large hollow stem and compact male buds... I feel it's a good candidate.... Will dust my females currently flowering this week.