Done!
Should I water it right now?
Maybe not for one or two days. Or a little mist to help the new roots (I watered it before repotting to make roots more flexible).
Because the space between roots was too tight, I needed medium size bark but the only available was from an epiphytic mix that contains also soma amount of coco chips and perlite, which I didn't want to use.
I used only a small amout of it (tried to pick up only the bark and leca and compensated with more leca and cork chips.
I believe the final result will give good drainage and won't retain too much water.
As usual, since I'm a clumsy guy on repotting, it end up a little "sideways" but in nature they don't have an orchid enthusiast putting them straight so it will survive.
Here's some photos:
Before cleaning
After cleaning
Final result
ES, thanks for the link. Really interesting site.
Unfortunately it's heartbreaking to know that many of those parks are struggling with difficulties.