I whole heartedly agree with Sonya above. I would just watch the new growths roots and leaves. If you keep on getting your new roots look like that (long and firm)and no pleating on leaves you're winning!. In my experience Oncs like alot of water BUT the roots need to dry out quickly or they rot.(like Cattleya)
Have you thought about a repot and getting all those lovely roots into a medium? As Sonya said the old wrinkled p/bulbs arn't going to change. Keep us posted on what you decide.
PS: In my environment Oncs grow really well in s/h. But if you do decide to do this all the older roots need to stay at the top end of the pot and get those brand new ones to grow into the leca by themselves. I first 'helped' mine along' by putting a bit of Spagh between them and the Leca.
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