Not all doctors perform all surgeries. I was lucky to get the top sports medicine guy at MUSC (Medical University of South Carolina), who performed an aggressive procedure.
If your knee is perfect with the cadaver, then the hamstring tendon may have been overkill (no pun intended), my knee was quite bad.
Indeed it sounds nasty! Mine was a partial tear that eventually ruptured completely. It was wacky times, the years I spent without an ACL without knowing it... my knee did all kinds of unusual things!