Questions about repotting bulbophyllum

[cmoonbeam1]

Hi everybody!

I recently got a bulbophyllum Elizabeth Ann 'buckleberry', and it's overgrowing its pot. It was only sent to me a few days ago, and the seller recommended waiting a few months before repotting, but the little guy seems in pretty good shape (has already started growing a new root since I got it).

I really want to repot it, partially because it's escaping, because it's putting out a flush of new roots (on the section that is climbing out of the pot) and also because it's potted in sphagnum which is now two years old, so it's time.

I hear bulbos really don't like being repotted. The stress of its journey from the greenhouse to my apartment seems to be negligible, but will repotting it so soon be too much? It seems quite robust.

I bought a new pot (clay) but it's kind of big compared to the current pot, as you can see from the picture. However, it is shallow. Will it be too big?

One final question. I was thinking of repotting it in a mix of bark, charcoal, perlite and sphagnum. Thoughts?

Basically, I don't want to freak the little guy out too badly. All advice appreciated!