During the second surgery they used an epidural which is suppose to numb the body from the waist down, but didn't work too well in my case so they pumped me full of demerol while the supposedly pulling down the spermatic cord to attached it to the body. What it felt like was the equvilent of them tying it to a door knob then opening and slamming the door. The pain killers they gave me after the proceedures were strong enough to lessen the torture greatly, but they also made me rather disfunctional. After I had recovered sufficently from the second surgery they sent me to the psyche ward because I had admitted I had removed it myself. In retrospect I would have to say my method of choice would be to have the proceedure done by a licensed professional.
Surgical castration is a very tricky thing and bleeding to death is a real issue.
My second choice would be the application of a 14 inch or larger burdizzo clamp, crushing each cord twice instead of the usual once. The clamp is non-invasive and easy to use. The recovery time is minimal. Yes I do. It of course is very small and the skin is very thick due to the shrinkage.