Basically I just want to create more femmed seeds from purchased femmed seeds from a seedbank.

They only offer fem seeds for this strain, so that is where I am right now. I do not want to keep purchasing them when I could just make my own (of course with care and careful planning.) I know it may be tricky since the seeds purchased will be feminized. So I would have to use 2 seeds to grow 2 plants, force one to herm and grow pollen sacks, then pollenate the non stressed female plant. Would that work? It will be the same genetics.