Beautiful roots Ken but I would be too scared to cut he roots off. Cutting up the top would be helpful though but be sure they have more than 5 sets of leaves on the lower bottom half; as well as plenty of roots and 5 sets of leaves or more on the top part. This way the lower bottom can recover fast and produce even more keikis and the top part will continue its blooming life cycle uninterrupted.
That's a beautiful Vanda by the way Elaine