I haven't made my own feathers in years. Store bought feathers are just too convenient. Back in the day, I just split the quills and scraped the pith with a pocketknife, then cut them to shape with a pair of scissors. I did try a feather burner once. Works great, but my wife said she'd divorce me if I ever fired that stinkin' thing up again.

Never have used one, myself, but they say feather choppers work really well.
Hope you're not allergic to traditional supplies, because that's the only place you're going to find feather burners and choppers.[8D]
www.3riversarchery.com