Close, I use a hacksaw blade with the back half sharpened for the blade.
That one took less than an hour to make and chopped around 10 doz feathers before the scrap pine board split. The second chopper I made had some "improvements" that worked well and some I'd recommend against
Use a 2x6 for the base and don't put any groove other than the one for the base of the quill. That was one mistake I made on the one shown. The second had a cork pad, which worked well, but a plain wood block works better.
Make the upper piece out of a hardwood or another 2x6. My first was just a scrap piece of 3/4" pine that eventually split from use. The blade is sunk into the top block. I drew the shape I wanted, used a knife to score , then the hacksaw blade to clean out the groove. No glue is needed, just press the blade in and give it a wack on the base to seat it good.
You can make a feather clamp or two out of a paper clip to keep your fingers away from the blade. Just shape them and put one end in the base. Insert your feather into the groove, move the clamps over and chop.
It doesn't take long to make these and the work just as well as the ones you buy.