Thanks penny. I recently made the call to abandon feminized seed. I'll keep what I have, but all new purchases will be regs. Fems are great if there wont be any breeding, but I'd rather not muck about with reversing plants and all that. Male plants will be better. I have a seperate small room under slightly negative pressure with it's own ventilation. I'll be using that for males so I dont end up accidentally pollinating entire runs.
I also plan to pollinate a seperate branch on every female with pollen from each male. Seems like that will be the best way to maintain diversity.