I did a lot of reading of medical papers before I opted in for surgery. Trying all the various pain treatments etc. One thing I came away with was that Scrotal Orchiectomy seems to go bad way WAY too often. A real crap shoot. And for guys who have pain issues?
The pain doctor I was working with was a great resource. He also knew this Inguinal vrs Scrotal biz and he btw was the one who suggests that its important to inject the cords / testes with nerve blocks before they are removed to avoid later problems with phantom pains. As with any "amputation" there is thought that knocked out or not trauma to the removed part(s) priot to the actual cut equals phantom pain issues later.
There is a member here who had his cords cut through a small incision (Laproscopic?) and this resolved his pain.