Reptiles are disturbing to butcher. I have a hard time with the fact that they're still alive and moving, long after their head has been chopped off!
One older cookbook I have describes an easier way, although I haven't tried it. According to the book, you start by dropping them into a pan of boiling
water, the same way you would with lobster. I think the cooking time was the same as lobster, too, with 9 minutes for the first pound and 4 min for every pound after that. I'm going by memory, though, so I could have the time wrong. Anyway, after it has boiled long
enough, you take the turtle out and then continue with the butchering process. This way the turtle is dead and not moving, and hopefully had a shorter period of "in-between" when it was suffering.