Transgenders in Halacha and Circumcision

Hello Rabbi Michi!
I haven’t seen if you’ve written a new column about this yet, but I’ll ask anyway.
1. Is it possible to add a transgender man (who has undergone a sex change from female) to the minyan, to elevate him to become a member of the Sht?
2. Currently, I am not very sure that lower back surgery for trans women involves castration (in Israel, it is performed at Tel Hashomer, and I need to check, but I think they take the skin from the scrotum and do a procedure there and the result is a female genitalia. I will get back to you with an in-depth answer on the subject. My question is whether there is a permit for lower back surgery if it does not involve castration.
3. A person who was circumcised by a surgeon, and apparently did not bless the circumcision but cut the foreskin and sucked, is his circumcision kosher?
4. Would you recommend (as a graduate of the faculty) electrical engineering/mathematics at Bar Ilan, or is TUT preferable? In terms of the lecturers and academics.