Thanks for all your info. I have been very interested in caponizing for a long time and have also read everything I can find.
I bought 10 cockerels speckled sussex when I ordered my pullets this spring to caponize but did chicken out. I decided to wait and caponize them after I butchered them as practice to learn what I was doing because I know if I cut into a bird and it died then I would be done. I am planning on hatching some chicks next spring and caponizing them. Normally I hatch about 70-80% males, I am just lucky that way. My long term goal, provided I don't throw up the first time I try it is to raise Jersey Giants as capons. I think they would be an awesome capon and much better than turkey. I have never thought much of the size of cockerels when you have to cull them at 18 wks.
That China video was so cool. He held his wing down with his foot and snip, wiggle, wiggle and the chick ran off, done. Amazing. I hope mine go that quickly.