Feminizing already feminized seeds ????

Hello everybody
In the past i have already made "feminized" seeds (autostrain) with C.S.
but the seeds i used to start with were regulars and i just weeded out the males..
I want to try and feminze some easyryders but i can only find feminized seeds
and no regulars...
Im worried bout the hermie rate if i try to use C.S. on feminzed seeds..
Annybody has experience with this ?
Thanx

oke maybe the title is a lil bit confusing, i mean i wanna do this so i dont have to pay for new feminized seeds...
annybody ???

you need a substance(i dont know) to give to the buds. Once you give it the buds will create pseudo-pollen and pollinate itsself.
The seeds that will occure from the procedure will be feminized(as soon as the dna of the motherplant is 100%feminized already for some generations.