Repotting Psychopsis Mariposa 'Magestic' (Kalahi x papilio)

[Donald]

Greetings everyone. I posted this also on the Advanced Forum. I have this Psychopsis that has been in constant bloom for the past two years that need to be repotted. It's in sphagnum in a clay pot and the moss has just about had it. Is there a good time to do this? In other words should I do it while in bloom or when the flowers drop off? Problem is it has four stems so at any given time there's a flower on the plant. Needless to say thank you all for any responses I receive to my inquiry.Thank you and have a great day
Donald in Worcester, MA