The whole point of crystaliron is that the crystal structure is *stable*.
    (and other perfectly reasonable points)

No objection here. So do away with the need for a stabilizing field for it. Or say that
it is stable, but the crystal matrix can get deformed in use, and so needs to be reset
from time to time, usually by sticking it into a holder overnight. The same might apply
for any other normal atomic materials - if your diamond blade gets chipped, the magic
nanotech holder will rebuild it in 1D6 days.