To be honest ive only ever done it the other way round.
Pitty about the noise,the growth from dwc is much better.
Can you get some hydroton?
Mixing a lil hydroton will help with airation.
Use Superthirve if you have it or anything you might have to help with stress.
If the rootball is too big I would prune it,as its reveging its well established and there is no need for roots with no shoots,right.
If your soil is organic it will have enought food for a while,you should consider an organic nute,just water and a lil superthrive should be ok.
Your plant will wilt,a humidity dome will help for a day or two.
Hopefully someone who has actually done this before will chime in.If not go for it before those roots get too big.
Goodluck.