Didnt read through all the way. I am positive its probably been answered by another wise person, but you can certainly breed with a feminized seed and regular pollen, I have personally without a problem. The only problem comes when that feminized seed isnt a true female, and shows herm traits even if slightly then that can carry over eventually or maybe it wont, it just depends on the genes. I think alot of the issue with using feminized genetics and where people got off saying it would herm is because people were not being very in tune with there plants they were using. Even if the plant throws a little male sackage it still has a herm trait in there somewhere. Just goes to show what that little extra digging around and closely looking at the plants can save ya.