Cymbidium, to trim or NOT to trim 1/3 bottom root mass before S/H potting.

[Ray]

The fact that it's going into S/H culture is irrelevant. The plant will need to replace its root system anyway.

However, I would think that undamaged (OK - minimally damaged) roots would support the plant better while it does. Just be certain that none of the roots are potted in the reservoir, but kept above it. The new roots will grow into it eventually, but that's OK.