Should I resist the urge?

[Highland Fashionista]

Hi everyone, thanks for your input on my last question about my crazy-dehydrated-new-roots-everywhere rescue phal. It seems happy now.

Here's the question:

I just bought a Tiny Twinkle oncidium on eBay. It has two spikes in it! Whoop! However, it is potted in sphagnum moss and perlite. I try to avoid that mix here in Scotland because I find it causes insta-rot with the climate. But I know that if I change the medium now, that might be the undoing of the flower spikes that will likely already be stressed from the voyage. Would I be safe to at least change the black plastic pot out for a clear one? What would you guys do? Would you just leave it or go for it?