Sliting the neck isn't hard after a few times. I wont say I can do it with my eyes closed, because I wont, but....I'll put the bird in a cone, with it's back towards me. I'll take it's head in my hand, with my thumb on the back of it's head. Pull down gently so as to "stretch" the skin on the neck. A nice new or very sharp razor, up close to the wattle, I draw the blade towards me. No sawing back and forth. I'll repeat on the other side. For heavy feathered birds, when placing the knife, get it down below the feathers, touching the skin.
Kaj
Kaj