i don't cut
my way of fragging w/out cutting
if the rock the shroom is on is small then break the rock in half, the shroom should be attached to both halves. set half the rock on another rock rasied a little above the sand bed, let the other half dangle over the sand an inch or so. over the next few days gravity will pull the shrooms apart. this process allows the shroom to separate more naturally, it heals alot faster than being cut as it pretty much seals itself off as it seprates.
if it works for you then try it
i tried cutting a shroom in half once and both halves died.