Just a suggestion, but don't let the length of a chopper dictate what feather length you use. Not being critical of all the statements above, but I keep all my cut off ends of all feathers. I can splice two one inch pieces and chop a 2" feather almost as easy as I can splice any length to chop. With that being said, you will get more feathers naturally from shorter feathers spliced than you will taking 2 full lenght feathers and only getting one 5" since most commercial feathers today are not long enough to get two 5 inch, but you could if you slpice them.