Odontocidium Tiger Crow 'Golden Girl' with leaves turning yellow

[(..._...)]

If you can buy clear pots, yes!! they are great. You may not need to pot up though. As you mentionned before, they like to be a bit cramped in their pot. If the roots are healthy, but not completely filling the pot, you can just clean away the old medium, and add fresh stuff.

Check the roots though, my odontocidium Tiger Crow 'Golden Girl' 's pseudobulbs aren't as wrinkled. (well the largest one isn't anyways. Could be just that some plants are different though.
good luck
Cam