I'm hesitant to say this, but in my very humble opinion, I think it is unwise to tamper with the natural sex of MJ. Especially if you pay top dollar for quality genetics. I'm willing to bet its a bad idea to try to improve on a breeders work. Especially the top breeders.
If you pay some serious bucks, and your looking for a permanent mother, just let nature ride and take your chances. Exposing your seedlings to this type of gas may induce hermy traits. Long story short, get a hermy in a nice grow, its very counter productive. I've never got less then 50/50 on male to female ratio's with any seeds.
I'm just thinking out loud, I may be wrong. Just intuition.
