It's very doable; I've cut out quite a few blades for my Segals and it is well worth the effort. As noted, you really only need to make sure the end notches on the blade slot remain intact; that will ensure accurate blade alignment. Don't worry about the size or shape of the center slot, just cut it out oversize so there is plenty of clearance to fit over the cap. Alignment is all in the end notches. As for scissors, I've had success with a pair of German made fingernail scissors with curved blades. The blade mod is a bit of a chore, but well worth it for the excellent shave provided by the Segal. If you could get blades off the shelf for the Segal, they would be selling for Fat Boy prices.