One alternative might be to replace the crescents with the nine-teeth style hand guards shown above. These are shown on some sickles from Wing Lam Enterprises.


These Sun-Moon swords, also from Wing Lam Enterprises, have a third kind of hand guard. Approximately half the length of the butterfly or cicada wing, but to compensate one has twice the number of blades, and now the two weapons can act more or less independently.