My Cattleya is a "Basket-case"

[Ian61]

I just received a Cattleya from a friend that knew I was recently hooked on orchids. I don't know what type or colour it is (wasn't tagged). It had flowered in the past (stems cut back).
Anyway, it is in a wooden-slatted box. I have researched this a bit and found that they can be planted this way. It looks like the growing meduim is Spag. moss.
I was wondering the following: Is the plant too large for the basket?, Would you recommend a bark mixture if you think it needs repotting? If you think its present condition is fine, how long can it grow in the basket until it needs to be re-potted?

I am posting pics (for the first time), so I hope it works.

Ian