Damaged Psychopsis (Mendenhall 'Hildos'- Repot Question

[BAK15]

I've reviewed threads on this forum when I've encountered orchid problems and a new issue recently surfaced so decided it's time to register to hopefully save one of my favorite plants.

Strong winds blew out a house screen which then tipped tray holding orchids onto the floor. My Psychopsis sustained a few broken leaves and broken pot. I was not able to repot the plant for one week. I repotted using Orchiata mix however did not have enough mix on hand. Restocked on Orchiata mix and want to repot but not sure how to repot this plant again (I also know they don't like to be disturbed).

Orchid is about 6 years old, was repotted after 2nd year. Prior to damage, plant was overgrown-looking and healthy in appearance with one stem flowering on one side and with three close to flower stage stems on opposite side.

Picked up ~5" clay pot with slits. Plant seems almost too large for pot (plant measures about 7" x 3"). Plant has a thin root structure but not as full as I expected in appearance. So that leads me to wonder, what is a healthy root structure appearance for this orchid. It grew in a much smaller pot than the one I picked up to repot. It looks like the plant could be split, since it has appearance of two plants, but not sure if that is wise.

Any feedback on how to repot this orchid would be appreciated. I'm tempted to try adding a few clay pellets or even Superthrive. The hydroponic store which sells the Orchiata mix sells Growstone but decided to take that back since threads indicate this raises the pH and would affect orchids negatively.